Question

Q2. One mole of oxygen gas at STP is equal to _______.

(i) 6.022 × 1023 molecules of oxygen

(ii) 6.022 × 1023 atoms of oxygen

(iii) 16 g of oxygen

(iv) 32 g of oxygeQ4. The number of radial nodes for 3p orbital is __________.

(i) 3

(ii) 4

(iii) 2

(iv) 1Q3. Which of the following statement is not correct about the characteristics of cathode rays?

(i) They start from the cathode and move towards the anode.

(ii) They travel in straight line in the absence of an external electrical or magnetic field.

(iii) Characteristics of cathode rays do not depend upon the material of electrodes in

cathode ray tube.

(iv) Characteristics of cathode rays depend upon the nature of gas present in the cathode ray

tube​

Answer 1

Answer:

a) 32 g of oxygen

b) 3p orbital has (3-2 )=1 radical mode. answer is one,but it maybe 2

c) iii

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