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**1. Elements X and Y combine to form two compounds XY and X _{2}Y. Find the atomic weight of X and Y, if the weight of 0.1 moles of XY is 10g and 0.05 moles of X_{2}Y is 9g?**

(A) 30, 20

(B) 80, 20

(C) 60, 20

(D) 20, 30

**2. Which one will have the maximum numbers of water molecules?**

(A) 18 molecules of water

(B) 1.8 grams of water

(C) 18 grams of water

(D) 1.8 molecules of water

**3. The number of atoms present in 0.1 moles of a triatomic gas is?**

(A) 1.806 x 10^{23}

(B) 1.806 x 10^{22}

(C) 3.600 x 10^{23}

(D) 6.026 x 10^{22}

**4. Find the volume of O2 required to burn 1 L of propane completely, measured at 0o C temperature and 1 atm pressure?**

(A) 10 L

(B) 7 L

(C) 6 L

(D) 5 L

**5. A gas X has Cp and Cv as 1.4, at NTP 11.2 L of gas X will contain ____ number of atoms?**

(A) 1.2 X 10^{23}

(B) 3.01 X 10^{23}

(C) 2.01 X 10^{23}

(D) 6.02 X 10^{23}

**6. Which of the species is not paramagnetic?**

(A) As^{+}

(B) Cl^{–}

(C) Ne2^{+}

(D) Be^{+}

**7. Pressure has the same dimension as?**

(A) Energy per unit volume

(B) Energy

(C) Force per unit volume

(D) Force

**8. A container has an equal mass of H _{2}, O_{2}, and CH_{4} at 27^{o} C, the ratio of their volume is?**

(A) 16:8:1

(B) 8:1:2

(C) 16:1:2

(D) 8:16:1

**9. There are two chlorides of sulfur S _{2}CI_{2}. What is the equivalent mass of S in SCI_{2}?**

(A) 64.8 g/mole

(B) 32 g/mole

(C) 16 g/mole

(D) 8 g/mole

**10. Boron exists as two stable isotopes; ^{10}B(19%) and ^{11}B(81%). Find out the average atomic weight of boron in the periodic table?**

(A) 10.0

(B) 11.2

(C) 10.2

(D) 10.8

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