40 Most Important Mcqs for mdcat and NTS tests 2023

1

The  fastest effusion occurs in?

Answer : CH4 methane

2

Forces of attraction which may be present between atoms are  called?

Answer : Intramolecular forces 

3

The double helix structure of DNA is due to ?

Answer: Hydrogen bonding

4 Distillation under very reduced pressure is called?

Answer : Vacuum distillation

5

Heart weight

Answer-300 grams

6

Hemoglobin rich in?

Answer-protein

7

The most important stimulent in tea leaves is?

Answer-Caffeine

8

Adult pulse rate is?

Answer-72-80

9

Which gas is responsible for the greenhouse effect?

Answer-Carbon tetra chloride

10

The rear view mirror of a motor is?

Answer-Convex

11

The absorption of ink by blotting involves

Answer-Capillary action

12

A setlite moving around a earth move with?

Answer-Uniform acceleration

13

Who was the first to propose the theory of the expanding Universe?

Answer-Hubble

14

What instrument is employed to detect the purity of milk?

Answer-Lactometer

15

The working principle of a washing machine is?

Answer-Centrifugation

16

radioactivity was first discovered by?

Answer-Madam

17

The sky appears blue due to?

Answer-because reflect blue light

18           

The most abundant element in?

Answer-Oxygen

19

What material is the heating element of an electric current typically made from?

Answer-Nichrome

20

Oil rises un e wick due to?

Answer-Capillary action

21

Which is the following units represent the largest unit of energy?

Answer-Calorie

22

What gas is utilized in the production of soft drinks?

Answer-Carbon dioxide

23

What is the percentage of water in blood?

Answer-90%

24

For purification, we use?

Answer-Chlorine

25

The human blood is divided in?

Answer-Four groups

26

The tissues, muscles and blood are made of?

Answer-Protein

27

All energy forms are ultimately transformed into another form?

Answer-Heat energy

28

Silicon is a ?

Answer-Semi conductor

29

The ray with high penetrating power is?

Answer-alpha rays

30

Which pigment make the blood red?

Answer-Hemoglobin

31

Which acid is used in car battery?

Answer-Sulfuric acid

32

In eyes donation which following part of donor's is used?

Answer-Cornea

33

Storage batteries commonly contain?

Answer-Lead

34

At what voltage electric current is supplied to household in Pakistan?

Answer-220 volts

35

Heart beat per minute?

Answer-70-80 times

36

Which of the following is most elastic?

Answer-Steel

37

As the altitude increases, the temperature decreases at the rate of 1 degree for every?

Answer-300 feet

38

What gas is typically used in fire extinguishers?

Carbon dioxide

39

Food is mainly digested in?

Small intestine

40

A heart beat requires approximately?

Answer-.08 second