CBSE Class 9 Answered
Q NO 1 WHAT HAPPEN WHEN SOLUTION OF SODIUM CHLORIDE AND SILVER NITRATE MIXED TOGETHER
Q NO 2 WHAT HAPPEN WHEN SOLUTION OF SODIUM SULPHATE AND BARIUM REACT TOGETHER .
Q NO 3 TWO ELEMENT X AND Y COMBINE TO FORM COMPOUND XY IN RATIO 1:35.5 MASS. WHAT MASS OF Y WILL COMBINE 2 GRAMS OF X
QNO 4 IF 100 G OF WATER IS DECOMPOSED , HOW MANY G OF OXYGEN AND HYDROGEN ARE OBTAINED .
Q NO 5 THE ATOMIC NO. OF THREE ELEMENTS A, B,C ARE 9,10,13 RESPECTIVELY ,WHICH OF THEM WILL FORM A CATION.
Q NO 6. WHAT IS AVOGARDO'S CONSTANT.
Q NO 7 WRITE FORMULA OF QUICK LIME,ALUMINIUM OXIDE,SODIUM CARBONATE,BAKING SODA.
Q NO 8 WRITE CATIONS AND ANION IN THE FOLLOWING COMPOUNDS , CH3COONA,NACL,HNO3,MGCL2,CA3(PO4)2,H2SO4,ALCL3
Q NO 9 FIND THE MOLECULAR MASS OF H2S,CL2,CH3COOH,CH3CHO.
Q NO 10 . CALCULATE MASS OF ONE MOLE OF CO2,C2H6,CH3OH,OXYGEN GAS,CHLORINE GAS,NH3 AND NITROGEN GAS, 1.5 MOLES OF WATER , 3 MOLES OF NEON , 0.5 MOLES OF SODIUM , 2 MOLES OF NITROGEN ELEMENT.
Q NO 11 . HOW MANY MOLES ARE PRESENT IN THE FOLLOWING
a 4.6 gm of Na
b 200 gm of S
C Hf
d Sdjfs
e Dfjkj
Q NO 12 WRITE DIFFERENCE BETWEEN
A 2 N AND N2
B ATOM AND MOLECULES
C ANION AND CATION
D IONIC AND MOLECULE COMPOUND
Q NO 13 CONVERT IN TO MOLES
A 12 GM OF OXYGEN
B 20 G OF WATER
C 22 G OF CARBONDI OXIDE
D 4.9 G OF SULPHURIC ACID
E 56 G OF QUICK LIME
F 1.06 OF BAKINF SODA
Q NO 14 Show 5 moles of carbondioxide and 5 moles of water do not have same mass.
Q NO 15 Show 240 g pf calcium and 240 g of magnesium elements have a mole ratio of 3:5
Q NO 16 Compute the number of ions present in 5.85 g of sodium chloride .
Q NO 17 How many grams of magnesium will have the same number of atoms as 6 g of carbon.
Q NO 18 A gold sample contains 90% of gold and rest copper . How many atoms of gold are present in one g of this sample .
QNO 19 Calculate the mass percentage of each element in one mole of Al2(co3)3
QNO 20 You are provided with few white coloured powder which is either sugar or common salt . How will you identify without tasting it.
Asked by ajaykataria222 | 31 Dec, 2017, 06:13: PM
Expert Answer
Que 1.
When solution of sodium chloride and silver chloride are mixed together, they will give displacement reaction and
sodium nitrate and silver chloride will formed as a product.
Answered by Varsha | 01 Jan, 2018, 05:42: PM
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