Timed Challenge - Answer & Submit | GK Mania

1 What is the middle term in expansion of (1+x)²ⁿ?

A) ²ⁿCₙ·xⁿ

B) xⁿ

C) (1+x)ⁿ

D) ²ⁿCₙ₊₁·xⁿ⁺¹

2 What is the term for a substance that dissolves?

A) Solution

B) Suspension

C) Solvent

D) Solute

3 What is the integral of sec²(x)?

A) tan(x) + C

B) cot(x) + C

C) csc(x) + C

D) sec(x) + C

4 What is the Perkin reaction product?

A) α,β-unsaturated aromatic acid

B) Aldehyde

C) Ketone

D) Alcohol

5 What is the half-life formula?

A) N = N₀·e^t

B) N = N₀/t

C) N = N₀·2^(t/T)

D) N = N₀(½)^(t/T)

6 What common chemical compound has the formula NaOH?

A) Sodium hydroxide (lye)

B) Sodium bicarbonate

C) Sodium nitrate

D) Sodium chloride

7 What is the directrix of the parabola y² = 4ax?

A) x = −a

B) x = a

C) y = a

D) y = −a

8 What is the formula for sin(3A)?

A) 3sinA + 4sin³A

B) 3sinA − 4sin³A

C) sinA·sin2A

D) 4sin³A − 3sinA

9 What is the gravitational potential at the surface of Earth?

A) GM/R

B) −GM/R²

C) GM/R²

D) −GM/R

10 What is the magnification of a compound microscope?

A) fo/fe

B) −(L/fo)(D/fe)

C) L/(fo·fe)

D) fe/fo

Quiz

1 What is the middle term in expansion of (1+x)²ⁿ?

2 What is the term for a substance that dissolves?

3 What is the integral of sec²(x)?

4 What is the Perkin reaction product?

5 What is the half-life formula?

6 What common chemical compound has the formula NaOH?

7 What is the directrix of the parabola y² = 4ax?

8 What is the formula for sin(3A)?

9 What is the gravitational potential at the surface of Earth?

10 What is the magnification of a compound microscope?

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Quiz

1 What is the middle term in expansion of (1+x)²ⁿ?

2 What is the term for a substance that dissolves?

3 What is the integral of sec²(x)?

4 What is the Perkin reaction product?

5 What is the half-life formula?

6 What common chemical compound has the formula NaOH?

7 What is the directrix of the parabola y² = 4ax?

8 What is the formula for sin(3A)?

9 What is the gravitational potential at the surface of Earth?

10 What is the magnification of a compound microscope?

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Quiz Results