Science GK questions 2021 for Competitive Exams

📘Science GK questions 2021 for Competitive Exams🖊️

Q: which metals forms an amalgam with other metals?

(a) Tin

(b) Lead

(c) Mercury

(d) None of these

Ans: Mercury

Q: used in pencils?

(a) Graphite

(b) all of these

(c) Charcoal

(d) None of these

Ans: Graphite

Q: Chemical formula for Benzene is

(a) C6H6

(b) C6H5-CH3

(c) C6H12

(d) C2H2

Ans: C6H6

Q: what is Water density

(a) 1.0 g/cm³

(b) 2.9 g/cm³

(c) 1.5 g/cm³

(d) 1.2 g/cm³

Ans: 1.0 g/cm³

Q: what is Unit of electricity?

(a) kWh

(b) Ohm

(c) Jule

(d) None of these

Ans: kWh

Science GK questions for Competitive Exams

Q: what is Acceleration Formula

(a) a=Time Taken/Change in velocit

(b) Angular speed=total distance traveled/total time taken

(c) a=Change in velocity/Time Taken

(d) None of these

Ans: a= Change in velocity/Time Taken

Q: what is Atomic Formula

(a) Atomic mass = Number of protons – number of neutrons – number of electrons

(b) Atomic mass = Number of protons + number of neutrons – number of electrons

(c) Atomic mass = Number of protons + number of neutrons + number of electrons

(d) None of these

Ans: Atomic mass = Number of protons + number of neutrons + number of electrons

Q: The power of a lens is measured

(a) aeon

(b) diopters

(c) candela

(d) None of these

Ans: Diopters

Q: Who is Father of Modern Chemistry?

(a) Einstein

(b) Antoine Lavoisier

(c) Theophrastus

(d) Mendel

Ans: Antoine Lavoisier

📘Science GK questions for Competitive Exams🖊️

Q: Who invented periodic table in Chemistry?

(a) Dmitri Mendeleev

(b) Alan Emtage

(c) Dennis Ritchie

(d) Tim Berners-Lee

Ans: Dmitri Mendeleev.

Q: What is marsh gas?

(a) Ozone

(b) Ethene

(c) Hydrogen

(d) Methane

Ans: Methane

Q: Which is the simplest sugar ?

(a) Fructose

(b) sucrose

(c) Glucose

(d) None of These

Ans: Glucose

Q: chemical name of Vitamin B3 ?

(a) Retinol

(b) Niacin

(c) Thiamine

(d) None of These

Ans: Niacin

Q: what is fourmula of Ascorbic acid?

(a) Hcl

(b) C6H8O7

(c) C6H8O6

(d) None of These

Ans: C6H8O6

Science GK questions for Competitive Exams

Q: What is Molar mass of Citric acid?

(a) 196.12 g/mol

(b) 176.12 g/mol

(c) 192.124 g/mol

(d) Methane

Ans: 192.124 g/mol

Q: What is laughing gas with formula?

(a) Sulfur dioxide SO2

(b) Carbon monoxide CO

(c) Nitrous Oxide N2O

(d) None of These

Ans: Nitrous Oxide N2O

Q: Diamond is allotropic of

(a) Tin

(b) iron

(c) carbon

(d) None of These

Ans: carbon

Quiz: Which animal lays eggs?

Ans: Duck

Quiz: A male cow is called?

Ans: Ox

Quiz: All animals need food, air, and ____ to survive.

Ans: Water

Quiz: What is Earth’s only natural satellite?

Ans: Moon

Quiz: The tree has a branch filled with green _____.

Ans: Leaves

 

📘Science GK questions for CDS🖊️

Quiz: What part of the body helps you move?

Ans: Muscles

Quiz: What star shines in the day and provides light?

Ans: Sun

Quiz: Legs have feet and arms have ___.

Ans: Hands

Quiz: In which of seasons will you see a rainbow more often?

Ans: Monsoon

Quiz: Which of these grows from a seed?

Ans: Grass

Quiz: which material is got from animals, and is used to make clothes?

Ans: Silk

Quiz: Fuel is used up to give the energy to make things work. Petrol is a type of fuel used in vehicles to make them run. Which of these is also fuel?

Ans: Food eaten by a person

Quiz: Shushila has brown eyes. The following people in her family have brown eyes whom could she have got her brown eyes from?

Ans: Her grandmother

Quiz: Choose the word which can be substituted for the given sentence – A doctor specialised in children and their diseases.

Ans: Cardiologist

 

📘Science GK questions for NDA🖊️

Quiz: Which planet is nearest to Earth?

Ans:Mercury

Quiz: The filament of a light bulb is made up of:

Ans: Tungsten

Quiz: Which of the following coloured light has the lowest frequency?

Ans: Red

Quiz: What is the unit of the magnitude of the weight?

Ans:Force Newton

Quiz: What is the value of Pi?

Ans:3.14159

📘Science Quiz for CDS, SSC, CGL🖊️

Quiz: Identify the pair that is correctly matched?

Ans: Albert Einstein: Photoelectric effect

Quiz: Refraction, Reflection, Dispersion and Diffraction are associated with

Ans: Light

Quiz: Which one of the following is not a part of small intestine?

Ans: Caecum

Quiz: Cell or tissue death within a living body is called as –

Ans: Necrosis

Quiz: Which of the following blood cells is compulsory for blood coagulation?

Ans: Platelets

Quiz: In the human body, Cowper’s glands produce the growth hormone (somatotrophin)?

Ans: Pituitary

Quiz: Cloves, used as a spice, are derived from which of the following plant parts?

Ans:Flower buds

Quiz: Which one among the following kinds of organisms resides in the roots of pulse to do nitrogen fixation?

Ans: Bacteria

Quiz: An organism that transmits disease from one individual to another is called –

Ans: Vector

Quiz: The part of brain which controls mood and anger in our body is

Ans: Hypothalamus

Quiz: To reduce tooth decay most toothpastes contain a –

Ans: Fluoride