Timed Challenge - Answer & Submit | GK Mania

1 What is the binomial coefficient C(n,r)?

A) n!/r!

B) n·r

C) (n−r)!/r!

D) n!/(r!(n−r)!)

2 What element makes up diamonds?

A) Oxygen

B) Nitrogen

C) Carbon

D) Silicon

3 What is the derivative of sin(x)?

A) tan(x)

B) −sin(x)

C) cos(x)

D) sec(x)

4 What is the energy of an electron in the ground state of hydrogen?

A) −1.51 eV

B) +13.6 eV

C) −13.6 eV

D) −3.4 eV

5 What is ∫₀^(π/2) sin(x) dx?

A) π/2

B) 0

C) 2

D) 1

6 What is the determinant of a 2×2 matrix?

A) ab − cd

B) ad − bc

C) ad + bc

D) ac − bd

7 What unit measures frequency?

A) Newton

B) Hertz

C) Joule

D) Pascal

8 What is the carbylamine test positive for?

A) Alcohols

B) Tertiary amines

C) Secondary amines

D) Primary amines (isocyanide odor)

9 In Young's double slit experiment, fringe width is proportional to?

A) λd/D

B) D/λd

C) d/λD

D) λD/d

10 What law says every action has a reaction?

A) Newton's first

B) Hooke's law

C) Newton's third

D) Newton's second

Quiz

1 What is the binomial coefficient C(n,r)?

2 What element makes up diamonds?

3 What is the derivative of sin(x)?

4 What is the energy of an electron in the ground state of hydrogen?

5 What is ∫₀^(π/2) sin(x) dx?

6 What is the determinant of a 2×2 matrix?

7 What unit measures frequency?

8 What is the carbylamine test positive for?

9 In Young's double slit experiment, fringe width is proportional to?

10 What law says every action has a reaction?

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Quiz

1 What is the binomial coefficient C(n,r)?

2 What element makes up diamonds?

3 What is the derivative of sin(x)?

4 What is the energy of an electron in the ground state of hydrogen?

5 What is ∫₀^(π/2) sin(x) dx?

6 What is the determinant of a 2×2 matrix?

7 What unit measures frequency?

8 What is the carbylamine test positive for?

9 In Young's double slit experiment, fringe width is proportional to?

10 What law says every action has a reaction?

Navigator

Quiz Results