1.

₆C¹² and ₁T³ are formed in nature due to the nuclear reaction of neutron with

• ₇N¹⁴

• ₆C¹³

• ₂He⁴

• ₃Li⁶

In which of the following reactions, the concentration of product is higher than the concentration of reactant at equilibrium? (K = equilibrium constant)

• A $\rightleftharpoons$ B; K = 0.001

• M  K = 10

• X $\rightleftharpoons$ Y; K = 0.005

• R $\rightleftharpoons$ P; K = 0.01

The electrochemical equivalent of a metal is 'x' g coulomb^-1. The equivalent weight of metal is

• x

• x × 96500

• $\frac{\mathrm{x}}{96500}$

• 1.6 × 10¹⁹ × x

Which of the following pairs of ions are colourless ?

• Ti³⁺, Cu²⁺

• Sc³⁺, Zn²⁺

• Co²⁺, Fe³⁺

• Ni²⁺, V³⁺

Which of the following is not correct regarding the properties of ionic compounds?

• Ionic compounds have high melting and boiling points

• Their reaction velocity in aqueous medium is very high

• Ionic compounds in their molten and aqueous solutions do not conduct electricity

• They are highly soluble in polar solvents

x grams of water is mixed in 69 g of ethanol. Mole fraction of ethanol in the resultant solution is 0.6. What is the value of x in grams?

• 54

• 36

• 180

• 18

Match the following lists:

List - I	List - II
A. Ethane	1. sp carbons
B. Ethylene	2. 6 sp2 carbons
C. Acetylene	3. 2 sp3 carbons
D. Benzene	4. 2 sp2 carbons 5. 1 sp and 1 sp2 carbons

• A - 3; B - 4; C - 1; D - 2

• A - 4; B - 5; C - 3; D - 2

• A - 3; B - 1; C - 2; D - 5

• A - 2; B - 3; C - 4; D - 5

The number of oxygen atoms bonded to one phosphorous atom in P₄O₆ is

• 4

• 3

• 6

• 5

Which of the following has S - S bond?

• H₂S₂O₆

• H₂S₂O₇

• H₂S₂O₈

• Mustard gas

An organic compound containing C and H has 92.3% of carbon. Its empirical formula is

• CH

• CH₃

• CH₂

• CH₄