An organic compound containing C, H and O gave the following analysis: C=40%; H=6.66%; Its empirical formula would be
Options
(a) C₃H₆O (b) CHO (c) CH₂O (d) CH₄O
Correct Answer:
CH₂O
Explanation:
At […]
A bromoalkane contains 35% carbon and 6.57% hydrogen by mass. Calculate the empirical formula of this bromoalkane.
Options
(a) CH₂Br (b) C₂H₂Br₂ (c) C₄H₄Br (d) C₄H₉Br
Correct Answer:
C₄H₉Br
Explanation:
1) Assume 100 […]
1 c.c N₂O at NTP contains
Options
(a) (1.8/224) x 10²² atoms (b) (6.02/22400) x 10²³ molecules (c) (1.32/224) x 10²³ electrons (d) all the above
Correct Answer:
all the above
Explanation:
At N.T.P […]
100 mL each of 0.5 N NaOH, N/5 HCl and N/10 H₂SO₄ are mixed together. The resulting solution will be
Options
(a) acidic (b) neutral (c) alkaline (d) None of these
Correct Answer: […]
What is the weight of oxygen required for the complete combusion of 2.8 kg of ethylene?
Options
(a) 2.8 kg (b) 6.4 kg (c) 9.6 kg (d) 96 kg
Correct Answer:
9.6 kg
Which has the maximum number of molecules among the following
Options
(a) 44 g CO₂ (b) 48 g O₃ (c) 8 g H₂ (d) 64 g SO₂
Correct Answer:
8 g H₂
Explanation: […]
A sample of CaCO₃ is 50% pure. On heating 1.12 L of CO₂ at STP is obtained. Residue left(assuming non volatile impurity) is
Options
(a) 7.8 g (b) 3.8 g (c) 2.8 g […]
A mixture contains O₂ and N₂ in the ratio of 1 : 4 by the weight. The ratio of their number of moles is
Options
(a) 1 : 8 (b) 1 : 4 […]
Ratio of Cᵥ and Cᵥ of the gas X is 1.4. The number of atoms of the gas X present in 11.2 litres of it at NTP will be
Options
(a) 6.02 x […]
Gram molecular volume of oxygen at STP is
Options
(a) 3200 cm³ (b) 5600 cm³ (c) 22400 cm³ (d) 11200 cm³
Correct Answer:
5600 cm³
Explanation:
Gram molecular volume of oxygen at STP […]
2017 Copyright Doctor Dreams Training Academy