The density of air is 0.001293 g/cc at STP. Its vapour density is
Options
(a) 0.001293 (b) 8.2786 (c) 14.49 (d) 6.2706
Correct Answer:
14.49
Explanation:
At STP, 22.4 litres of gas is equal […]
Boron has two stable isotopes, ¹°B(19%) and ¹¹B(81%). Average atomic weight for boron in the periodic table is
Options
(a) 10.8 (b) 10.2 (c) 11.2 (d) 10
Correct Answer:
10.8
Explanation:
Avg Atomic […]
1.520 g of hydroxide of a metal on ignition gave 0.995 g of oxide. The equivalent weight of metal is
Options
(a) 1.52 (b) 0.995 (c) 190 (d) 9
Correct Answer:
9
Explanation:
One […]
At S.T.P the density of CCl₄ vapours in g/L will be nearest to
Options
(a) 6.87 (b) 3.42 (c) 10.26 (d) 4.57
Correct Answer:
6.87
Explanation:
Molecular Weight of CCl₄ = 35.5 + […]
In the final answer of the expression (29.2 – 20.2) (1.79 x 10⁵) / 1.37. The number of significant figures is
Options
(a) 1 (b) 2 (c) 3 (d) 4
Correct Answer:
3
Explanation: […]
0.45 g acid of molecular weight 90 was neutralise by 20 mL of 0.5 N KOH. The basicity of acid is
Options
(a) 2 (b) 4 (c) 1 (d) 3
Correct Answer:
2
Explanation: […]
One litre hard water contains 12 mg Mg²⁺. Milli equivalents of washing soda required to remove its hardness is
Options
(a) 1 (b) 12.16 (c) 1 x 10⁻³ (d) 12.16 x 10⁻³
Correct Answer: […]
The percentage weight of Zn in white vitriol [ZnSO₄ 7H₂O] is approximately equal to Zn=65, S=32, O=16 and H=1)
Options
(a) 33.65% (b) 32.56% (c) 23.65% (d) 22.65%
Correct Answer:
22.65%
Explanation:
Mol. […]
How many moles of lead (II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2 g of HCl?
Options
(a) 0.044 (b) 0.333 (c) 0.011 (d) 0.029
Correct […]
What is the mass of precipitate formed when 50 mL of 16.9% solution of AgNO₃ is mixed with 50 mL of 5.8% NaCl Solution? (Ag=107.8, N=14, O=16, Na=23, Cl=35.5)
Options
(a) 28 g (b) […]
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