Entry Test (NMDCAT & ECAT) Preparation for FSc students to get admission to Medical colleges and Engineering Universities

MCQ-1
Mg metal reacts with HCI to give hydrogen gas. What is the minimum weight of HCI required to produce 6g of H₂
A. 438g
B. 219g
C. 448g
D. 125g

Answer: B

MCQ-2
31g of CuCO₃ on heating gives 16g of CuO. What is the %age yield of the reaction
CuCO₃ —> CuO+CO₂
(M. mass of CuCO3: 124gmol^-1)
A. 80%
B. 85%
C. 75%
D. 50%

Answer: A

MCQ-3
How many molecules of NH₃ would be formed if 5.6dm³ of N2 gas reacts with an excess of H₂ according to the following equation
N₂ + 3H₂ —> 2NH₃
A. 1.505×10²³
B. 3.01×10^₂₃
C. 6.02×10²³
D. 2.4×10²⁴

Answer: B

MCQ-4
Which of the following contains the maximum number of atoms
A. 16g of the oxygen atom
B. 48g of ozone
C. 16g of CH4 gas
D. All contain the same number of atoms

Answer: C

MCQ-5
Empirical formula of a hydrocarbon having 80% C and 20% of hydrogen is
A. CH
B. CH3
C. CH₂
D. CH4

Answer: B