NEET1 NEET1 Chemistry States of Matter
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16th December 2017
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ICSE X Chemistry Mole Concept and Stoichiometry
Plz solve the numerical
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14th January 2018
9:44 AM
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ICSE X Chemistry Mole Concept and Stoichiometry
Plz solve the sum
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14th January 2018
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NEET1 NEET1 Chemistry
800g of 40% solution by weight was cooled 100g of solute precipitated the% composition of remaining solution is
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19th April 2018
4:33 PM
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CBSE XII Science Chemistry Isolation of Elements
In Carius method, for the estimation of halogen, 0.15g of an organic compound gave 0.12g of AgBr. The percentage of bromine in the compound is (a) 34.04% (b) 66.04% (c) 44.04% (d) 54.04%
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25th April 2018
6:50 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
2.5g of gane sugar is dissolved in147.5g of water find percent by weight of solution
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22nd May 2018
8:58 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
When 15g of a mixture of NaCl and Na2CO3 is heated with dil HCl, 2.5g of CO2 is evolved at STP. Calculate % composition of the original mixture.
Asked by PRIYA
7th June 2018
12:28 PM
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ICSE X Chemistry Mole Concept and Stoichiometry
A sample of coal gas contained 45% H2, 30% CH4, 20% CO and 5%C2H2 by Volume. 100 cm3 of this gaseous mixture was mixed with 190 cm3 of oxygen and exploded. Calculate the volume and composition of the mixture when cooled to room temperature and pressure
Asked by saranchemist1708
21st June 2018
7:57 AM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
calculate the percentage of the each element in 9.8g of sulphuric acid
Asked by shaileshbhagat82816
3rd July 2018
7:16 PM
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JEE Plances JEE (Main) Chemistry
A sample of impure cuprite Cu2O contains 66.6% copper. What is the percentage of pure Cu2O in the sample?
Asked by sakshisingh3124
7th July 2018
11:17 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
A sample contain 80% of n2 and 20% mole of O2. find molar mass
Asked by Vidhi.ozar
24th July 2018
7:02 AM
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ICSE X Chemistry Mole Concept and Stoichiometry
a compound of lead has the following percentage composition;pb=90.66%,o=9.34%. find the empirical formula of the compound[pb=207,O=16]
Asked by radhisenthil
31st July 2018
8:44 PM
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ICSE VII Maths
a student election was contested by john and peter in all there we are 5650 votes .80% of the votes we are polled. if john get 55% of the votes polled how many votes did peter get?
Asked by amanseth003
3rd August 2018
10:37 AM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
36% solution of H2SO4 having density 1.2gm/cc. ,find out percentage strength and strength of solution .
Asked by anandsikhar
12th August 2018
6:32 AM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
A mixture of pure AgCl and AgBr contains 60.94% Ag by mass what is % of AgCl in sample
Asked by shahrithik07
8th October 2018
6:44 PM
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ICSE VII Maths Percentage
12% of a sum of money is ₹42.What is 20% of the same sum
Asked by ankitray26132
18th October 2018
12:23 PM
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CBSE VIII Maths Comparing Quantities
A no is increased by 20%.by what per cent the new no is decreased so that the no restores the original value?
Asked by vickysinghrajput9315
22nd October 2018
10:42 PM
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ICSE VIII Maths Percentage
In an election between 2 candidates 10%votes were not polled. 10 % votes polled were found invalid . The success ful candidate got 54% of valid votes and won by a majority of 1620. Find the number of voters enrolled
Asked by tkuldeep331
24th October 2018
8:08 AM
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ICSE VI Maths Percentage -1
What is the number whose 8% is 18
Asked by rockingbros
15th December 2018
7:41 PM
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CBSE VIII Maths
the value of a house is increaced by 10% every year. its present value
Asked by shyamcomputer102
27th January 2019
3:31 PM
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JEE Main Chemistry Solutions
1.102 ques
Asked by lovemaan5500
30th January 2019
12:01 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
1.22 sum plz
Asked by lovemaan5500
30th January 2019
8:29 PM
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CBSE XII Science Chemistry Solutions
What volume of 95 percentage sulphuric acid of density 1.85 g per centimetre cube and what mass of water must be taken to prepare hundred centimetre cube of 15% solution of sulphuric acid of density 1.1 g per centimetre cube
Asked by fathimaaza26112001
6th March 2019
1:32 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
0.25gm of an organic compound in kjeldahl's method ,produced ammonia gas which was absorbed by 25ml of 0.5M H2SO4 . The residual acid required 30ml of 0.5M NaOH for complete neutralisation . find the percentage composition of nitrogen in the organic compound
Asked by satya785583
16th March 2019
8:58 PM
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Maharashtra IX Maths
Sameera spent 90% of her income and donate 3% for socially useful causes. If she left with Rs1750 at the end of the month, what was her real income?
Asked by Bhagyashrismarathe
23rd March 2019
6:15 PM
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ICSE VIII Maths Percentage
What percent f a day is the time duration of 3 hours
Asked by Arti9557
11th April 2019
10:19 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
Solve the question in photo showing each step clearly
Asked by Vidushi412
27th April 2019
5:37 PM
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NEET NEET Chemistry Solutions
Pls solving the follin
Asked by ntg432000
28th April 2019
4:25 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
Mixture of the propane and butane occupy 3 liter volume complete combustion of this mixture produced 10 liters co^2 find the constitution of this mixture
Asked by mannkhatri112
1st May 2019
7:24 AM
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JEE Main Chemistry Some Basic Concepts in Chemistry
My doubt is 50th ques Plz solve it
Asked by Mamtaraano00
2nd May 2019
10:58 AM
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CBSE XI Science Chemistry Mole Concept and Stoichiometry
Why we divide the percentage composition of a compound with its atomic weight while finding the empirical formula?
Asked by sanyammahajan2003
10th May 2019
7:31 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
Compare mass of pure NaOH in each of the following aqueous solution 1. 50 gram of 40% (w/w) NaOH 2.50 ml of 50% (w/v) NaOH (density of solution = 1.2 g/ml)
Asked by arushidabhade
7th June 2019
6:12 PM
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ICSE IX Maths
Why we multiply a fraction say a/b with 100% to get the percentage.like a/b*100% ...explain with the help of example
Asked by Anshu
12th June 2019
1:21 PM
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ICSE VIII Maths Percentage
A bookshop had 12000 books. In the first week of April, it sold 15% of the books; and in the second week, it sold 15% less. How many books did it sell in the second week? Also find the number of books left in the bookshop after the second week.
Asked by amar.kha.wbsedcl
15th June 2019
8:53 AM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
2 oxides of metal contain 50% and 40% of metal respectively. If formula of first oxide is MO then determine the formula of second oxide
Asked by anshulsingh7234
18th June 2019
9:56 AM
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CBSE VIII Maths Comparing Quantities
Jackson invested rs 20000, he invested a part of it at 12% and the rest at 10%, his annual income from these investments is 2280 rs. How much did he invest at each rate?
Asked by raj9852265141
8th July 2019
6:00 PM
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NEET NEET Chemistry Some Basic Concepts in Chemistry
find the persenties o,c,h in one mole of glucos
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10th July 2019
6:47 PM
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JEE Main Chemistry Some Basic Concepts in Chemistry
Question no 29
Asked by Adityaaryan681681
30th July 2019
10:15 PM
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NEET NEET Chemistry Some Basic Concepts in Chemistry
1 g mixture of CaCO3 and NaCl reacts completely with 100 ml of N/10 HCl. The % of CaCO3 in the mixture is-(1) 40%, (2)60%, (3) 50%, (4) 80%. Also mention which is to be taken as Solute, HCl or CaCO3??
Asked by patra04011965
7th August 2019
8:57 PM
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JEE Main Chemistry States of Matter
Sir plz solve it step by step ,U may leave part (b) but plz solve explaining part(a)
Asked by vishakhachandan026
8th August 2019
10:21 AM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
A compound of lead has the following percentage composition: Pb = 90.66%, O = 9.34%. Calculate the empirical formula of the compound.(Pb =207,O=16 )
Asked by vikas.kochhar6
30th August 2019
3:58 PM
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ICSE VIII Maths Percentage
what percentage of 25kg is 32.5kg
Asked by Manpreetgsinghgk
8th September 2019
10:42 AM
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ICSE VIII Maths Percentage
Amanda monthly income is 30000 if has income increases every year by 9% what will be his monthly income after 2 years
Asked by bebykhan730
8th September 2019
2:24 PM
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ICSE VI Maths Percentage
In a school 40% of the students are girls and the number of boys is 480 .find the total number of students in the school
Asked by bhattacharjeebeena
21st September 2019
10:14 AM
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CBSE IX Chemistry Atoms and Molecules
What does 20% w/v sugar syrup means what.
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15th October 2019
10:41 PM
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ICSE VIII Maths Percentage
1) Mr Das spends a fixed amount every amount every month on sugar consumption. If the price of sugar is increased by 25% & Mr Das still wants to spend the same amount every month, what should be his percentage reduction in consumption of sugar
Asked by Cl_narayan
21st November 2019
4:23 PM
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ICSE VIII Maths Percentage
1)65% of all the fruits in a shop at the beginning of the day were apples.After selling 75% of all the apples 104 apples were left at the end of the day.How many fruits were there in the beginning? 2) In a combined test on Maths & Science, 7.5% failed in Maths, 22.5iled in Science, & 5% failed in both the subjects. If 120 students passed in both the subjects, how many students attempted the test?
Asked by Cl_narayan
22nd November 2019
4:49 PM
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ICSE VII Maths Percentage
A man gave 25% of the amount of money with him to his eldest son,20% to his younger son and 20% of the remainder to his daughter and the rest ₹880to his wife.Find the amount of money he had with him and also find the ratio of the money received by his eldest son to his younger son and to his daughter
Asked by joypatel1213
21st December 2019
2:58 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
by the reactio of 10gm Mno2 & hcl , 2.24 L cl2 formed , calcule % composition of mno2?
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25th March 2020
8:23 AM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
what is the mole fraction of alcohol in 10% of alcohol w/w in water ?
Asked by abhishek19362771
8th April 2020
3:48 PM
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CBSE XII Science Chemistry Solutions
How can we differentiate between questions related to wt by vol% and vol by vol% or wt by wt%
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22nd April 2020
8:24 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
jkk
Asked by saswati509
3rd May 2020
10:10 AM
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ICSE IX Chemistry Language of Chemistry
calculate the percentage of phosphorus in : (a) Calcium hydrogen phosphate Ca(H2PO4)2 (a) Calcium hydrogen phosphate ( Ca(
Asked by mtomar7274
3rd June 2020
8:26 AM
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ICSE VII Maths Percentage
Arjuna ate 30% of a pizza and his friend ate 25% of it.How much is left?
Asked by sparshsolanki5970.7sdatl
8th June 2020
12:03 PM
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ICSE VIII Maths Percentage
What percent is: 300 grams of 2kg
Asked by samruddhikhedkar85.8spicertl
27th June 2020
4:56 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
calculate the percentage of carbon in 22% pure co2
Asked by nirajrane1234
9th September 2020
9:53 PM
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ICSE IX Chemistry Language of Chemistry
Calculate the percentage of nitrogen and oxygen in NH4NO3
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21st December 2022
9:03 PM
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CBSE X Maths Real Numbers
how much salt must be added to 60 kg of a 20%solution of salt to increase it to a 40% solution of salt
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6th January 2024
8:52 PM
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