PMS Competitive (General): Everyday Science MCQs with Answers

Question 1

In plant nutrition, which micronutrient is a component of chlorophyll and is essential for the light reactions of photosynthesis?

Accepted Answer

Magnesium

Answer

Iron

Answer

Zinc

Answer

Manganese

Question 2

Which bedside tool is routinely used to listen to heart and lung sounds?

Accepted Answer

Stethoscope

Answer

Otoscope

Answer

Ophthalmoscope

Answer

Sphygmomanometer

Question 3

When light travels from a less dense medium to a more dense medium it:

Accepted Answer

Slows down and bends toward the normal

Answer

Speeds up and bends away from the normal

Answer

Travels in a straight line

Answer

Reflects completely

Question 4

Which spacecraft was the first to leave the Solar System and enter interstellar space?

Accepted Answer

Voyager 1

Answer

Voyager 2

Answer

Pioneer 10

Answer

New Horizons

Question 5

Which plant macronutrient is most essential for chlorophyll synthesis and is often the limiting factor in plant growth?

Accepted Answer

Nitrogen

Answer

Phosphorus

Answer

Potassium

Answer

Calcium

Question 6

What is the chemical symbol for Lead?

Accepted Answer

Pb

Answer

Le

Answer

Ld

Answer

Pl

Question 7

Historically, who amongst the following, recognised in 1727 A.D. that sunlight and air are important for the growth of plants?

Accepted Answer

Stephen Hales

Answer

Joseph Priestley

Answer

Jan Ingenhousz

Answer

Lavoisier

Question 8

Which self-recording instrument traces changing atmospheric pressure on a rotating chart drum?

Accepted Answer

Barograph

Answer

Thermograph drum trace

Answer

Hygrograph hair linkage pen

Answer

Vehicle tachograph disk pack

Question 9

All of the following substances are crystalline except ____.

Accepted Answer

Plastic

Answer

Sucrose

Answer

Diamond

Answer

Ice

Question 10

In the Calvin cycle (light-independent reactions), what molecule acts as the primary CO2 acceptor?

Accepted Answer

Ribulose-1,5-bisphosphate (RuBP)

Answer

ATP

Answer

NADPH

Answer

Glucose-6-phosphate

Question 11

Which of the following has the lowest pH value?

Accepted Answer

Gastric juice

Answer

Blood

Answer

Milk

Answer

Pure water

Question 12

Which instrument is used to measure the degree of hardness of materials?

Accepted Answer

Mohs Scale

Answer

Kymograph

Answer

Lactometer

Answer

Kaleidoscope

Question 13

Which natural element has the highest melting point?

Accepted Answer

Tungsten

Answer

Copper

Answer

Iron

Answer

Silver

Question 14

The pH of milk is approximately:

Accepted Answer

6.5

Answer

7.5

Answer

6

Answer

7

Question 15

Sunlight can reach a depth of ____ meters in the clear ocean.

Accepted Answer

200

Answer

120

Answer

80

Answer

1000