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science MCQ: Practice Questions & Answers (Bengali) - ObjectiveMcq

science Practice

Topics

Biology
- Cell Biology
Chemistry
- Acids And Bases
- Periodic Table

Practicescience

science : Practice Questions and Answers

Browse topic-based science practice sets.

3 practice sets · Page 1 of 1

ScienceMediumChemistry Acids And Bases

1.

What is the pH of a neutral solution at 25°C?

A

0

B

7

C

14

D

1

Correct Answer:

(B) 7

Explanation:

A neutral solution has equal concentrations of H⁺ and OH⁻ ions. At 25°C, pH = 7 indicates neutrality.

ScienceEasyBiology Cell Biology

2.

Which organelle is known as the powerhouse of the cell?

A

Nucleus

B

Ribosome

C

Mitochondria

D

Golgi apparatus

Correct Answer:

(C) Mitochondria

Explanation:

Mitochondria produce ATP through cellular respiration, earning them the title 'powerhouse of the cell'.

ScienceEasyChemistry Periodic Table

3.

Which element has the chemical symbol 'Na'?

A

Nitrogen

B

Sodium

C

Nickel

D

Neon

Correct Answer:

(B) Sodium

Explanation:

'Na' comes from the Latin word 'Natrium', which is the symbol for Sodium.