VFA Mixed Practice Test #301

Question 1

What is the full form of CPU?‌​‍

Accepted Answer

Central Processing Unit — CPU stands for Central Processing Unit. ‌​‍It is the 'brain' of the computer that performs arithmetic and logical operations.

Answer

Computer Personal Unit

Answer

Central Program Utility

Answer

Computer Processing Unit

Question 2

A prism splits white light into its constituent colours by:‌​‍

Accepted Answer

Refraction combined with dispersion — Different wavelengths refract by different amounts — violet most, red least.‌​‍

Answer

Reflection

Answer

Absorption

Answer

Polarisation

Question 3

Which is commonly used to prepare ethene in the laboratory?‌​‍

Accepted Answer

Dehydration of ethanol with conc. H₂SO₄ — CH₃CH₂OH → CH₂=CH₂ + H₂O at 170 °C with conc. H₂SO₄.‌​‍

Answer

Reduction of ethanol

Answer

Oxidation of methane

Answer

Hydrogenation

Question 4

Blood pH:

Accepted Answer

7.35-7.45 — Slightly alkaline.

Answer

6.0

Answer

7.8

Answer

8.0

Question 5

Pulses producer (largest):

Accepted Answer

MP — Madhya Pradesh.

Answer

UP

Answer

Rajasthan

Answer

Maharashtra

Question 6

Which type of rock is formed by cooling and solidification of magma?‌​‍

Accepted Answer

Igneous — Igneous rocks = solidified magma/lava. Examples: granite, basalt.‌​‍

Answer

Fossil

Answer

Metamorphic

Answer

Sedimentary

Question 7

Which metal is used to make electromagnet?‌​‍

Accepted Answer

Soft iron — Soft iron has high magnetic permeability and low retentivity — ideal core for electromagnets.‌​‍

Answer

Copper

Answer

Cobalt

Answer

Stainless steel

Question 8

Jewish Synagogue in Kochi built in:‌​‍

Accepted Answer

1568 — Paradesi Synagogue in Mattancherry, Kochi — built 1568.‌​‍

Answer

1468

Answer

1768

Answer

1668

Question 9

The Glorious Revolution (1688) established:‌​‍

Accepted Answer

Constitutional monarchy (Bill of Rights 1689) — James II deposed; William and Mary invited. ‌​‍Bill of Rights 1689 limited royal power, affirmed Parliament's supremacy.

Answer

Absolute monarchy

Answer

Theocracy

Answer

Republic

Question 10

Across a period, atomic radius generally:‌​‍

Accepted Answer

Decreases (increasing nuclear charge, same shell) — Down a group: increases (more shells). Ionisation energy trends are opposite.‌​‍

Answer

Increases

Answer

Stays constant

Answer

Fluctuates randomly

VFA Mixed Practice Test #301