MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: R

There are no items in this cart.
Continue Shopping
Menu
Get instant 20% OFF on Online Material.
coupon code: MOB20 | View Course list

  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: R 15,000
  • View Details
Get extra R 15,000 off
USE CODE: askschfd09

Solved Examples on Evolution

(1) According to one of the most widely accepted theories the earth’s atmosphere, before any life had originated on this planet, consisted of a mixture of [CPMT 1981, 84, 2002]

(a) Water vapour, H2, NH3 and CH4 

(b) H2, CO2, NH3 and CH4          

(c) CO2, NH3, CH4 and water vapour

(d) CH4, O2 and water vapour

Answer: a

Solution:

According to one of the most widely accepted theories the earth’s atmosphere, before any life had originated on this planet, consisted of a mixture of Water vapour, H2, NH3 and CH4.

Get Chapter Test for this Topic

(2) If there was no CO2 in the earth's atmosphere, the temperature of earth's surface would be       [CBSE PMT 1998]

(a) Same as present                                

(b) Less than the present         

(c) Higher than the present                             

(d) Dependent on the amount of oxygen in the atmosphere

Answer:  b

Solution:

If there...

  • Complete AIPMT/AIIMS Course and Test Series
  • OFFERED PRICE: R 15,000
  • View Details
Get extra R 15,000 off
USE CODE: askschfd09