NEET Class XI Weekly Mock 20 for NEET & AIIMS Exams

Question 1

Good vision depends on adequate intake of carotene rich food.
Select the best option from the following statements:
(i) Vitamin A derivatives are formed from carotene
(ii) The photopigments are embedded in the membrane discs of the inner segment
(iii) Retinal is a derivative of Vitamin A
(iv) Retinal is a light absorbing part of all the visual photopigments

Question 2

Gustatory cells are present in _______?

Question 3

Out of ‘X’ pairs of ribs in humans only 'Y' pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation:

Question 4

Osteoporosis, an age-related disease of skeletal system, may occur due to

Question 5

Select the correct statement with respect to locomotion in humans:

Question 6

2,3-dimethyl-2-butene can be prepared by heating which of the following compounds with a strong acid?

Question 7

Select correct statement(s):

Question 8

Which of the following organic compounds has same hybridization as its combustion product –(CO₂) ?

Question 9

Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating ?

Question 10

Which of the following compounds will not undergo Friedal-Craft’s reaction easily:

Question 11

A wall has two layers A and B, each made of different materials. Both the layers have the same thickness. The thermal conductivity of the material of A is twice that of B. Under thermal equilibrium, the temperature difference across the wall is 36 °C. The temperature difference across the layer A is–

Question 12

Ventilators are provided at the top of room –

Question 13

If the temperature of the sun becomes twice its present temperature then –

Question 14

The water equivalent of the copper calorimeter is 4.5 g. The specific heat of copper is 0.09 cal g^–1 °C^–1. Which of the following is incorrect?

Question 15

The amount of thermal radiation emitted per second by a surface depends upon –