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Which of the following phenomena is related with the large transformers, when used for some time, become very hot and is cooled by circulating oil?

A. The heating effect of current alone

B. Hysteresis loss alone

C. Both the heating effect of current and hysteresis loss

D. Intense sunlight at noon

The working principle of a washing machine is

Nuclear sizes are expressed in a unit named

The resistance of an ideal voltmeter is;

Mass number is the sum of:

A defeat of vision in which the points in one plane of an object appear is focus while those in another plane are out of focus is called.

Which of the following works as the basis of conservation of liner ____

A plane glass slab is kept over colored letters, the letter which appears least raised is

What is the name of the force with which earth pulls everything towards itself?

If C=∙A∙B, what must be true about the directions and magnitudes of AS and B if C=A+B? What must be true about the directions and magnitudes of  A and B if C=0?

During a test crash, an air bag inflates to stop a dummy's forward motion. The dummy's mass is 80 kg. If the net force on the dummy is 850 N toward the rear of the car, what is the dummy's deceleration?

A. 0.09 m/s^2

B. -10.625 m/s^2

What is the most renewable energy source that attracted people’s attention nowadays?

Do you think in the near future we will lose electricity forever? And why?

Can a fire have a shadow?

• As light from a star spreads out and weakens, do gaps form between the photons?

• Can air make shadows?

• Can gold be created from other elements?

Can momentum be hidden to human eyes like how kinetic energy can be hidden as heat?

1. Radiocarbon is produced in the atmosphere as a result of

A. collision between fast neutrons and nitrogen nuclei present in the atmosphere

B. action of ultraviolet light from the sun on atmospheric oxygen

C. action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere

D. lightning discharge in atmosphere

2.  It is easier to roll a stone up a sloping road than to lift it vertical upwards because

A. work done in rolling is more than in lifting

B. work done in lifting the stone is equal to rolling it

C. work done in both is same but the rate of doing work is less in rolling

D. work done in rolling a stone is less than in lifting it

3.  The absorption of ink by blotting paper involves

A. viscosity of ink

B. capillary action phenomenon

C. diffusion of ink through the blotting

D. siphon action

Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to

A. the heating effect of current alone

B. hysteresis loss alone

C. both the heating effect of current and hysteresis loss

D. intense sunlight at noon

Nuclear sizes are expressed in a unit named

A. Fermi

B. angstrom

C. newton

D. tesla

• Can light bend around corners?

Which of the following is not a metallic mineral?

(A) Gypsum

(B) Limonite

(C) Bauxite

(D) Haematite

Blue vitriol is

(A) Sodium sulphate

(B) Iron sulphate

(C) Calcium sulphate

(D) Copper sulphate

Tear gas is

(A) Ammonia

(B) Hydrogen sulphide

(C) Chlorine

(D) Hydrogen chloride

The law of Octaves is due to

(A) Mendeleev

(B) Lother Mayer

(C) Dobereiner

(D) Newlands

Which one of the following is the softest?

(A) Aluminium

(B) Iron

(C) Lithium

(D) Sodium

In which type of rocks are metals like Gold and Copper mostly found?

(A) New metamorphic

(B) Old metamorphic

(C) Old sedimentary

(D) Old igneous

In coloured glass. the purple colour is imparted by

(A) Manganese oxide

(B) Cadmium sulphide

(C) Ferric oxide

(D) Selenium sulphide

The vinegar is a solution of

(A) 5% acetic acid in water

(B) 10% acetic acid in water

(C) 15% acetic acid in water

(D) 50% acetic acid in water

What is the definition of electromagnetic energy?

What are stereoisomers with examples?

What is meant by Coordination Chemistry?

What are ligands give an example?  

What is denticity of the ligand?

What is the other name of coordination geometry?

What is the difference between coordination number and coordination geometry?

Correct or Wrong

Donor atom use lone pairs of electrons to bind/connect to a central metal ion?