11th Class Physics MCQS Chapter 1

The shape of BF₃Molecule is:

Tetrahedral

pyramidal

Linear

Trigonal planer

The spectrum of radiations from which particular radiation has been absorbed after passing through Absorbing substance is called:

Band spectrum

Line absorption speturm

Line emission specturm

Continuous spectrum

Any device that changes non-electrical energy into electrical energy in an

Input/output device

Input device

Out put device

None of these

As compared to pure atomic orbitals the orbitals have:

Low energy

Same energy

High energy

Variable energy

Which of the following numbers is a perfect square?

12

9

14

24

When the principle of usher or agriculture tax was introduced on agricultural production?

1981

1983

1984

How many 5 digit multiples of 5 can be formed from the digits 2,3,5,7,9 When no digit is repeated.

16

38

45

24

The locus of mid point of facal chord of parabola is:

an elipse

a parabola

Hyperbola

a circle

Heat of vaporization for liquids with strong dipole dipole forces will have:

Very high values.

Negligible values.

Very low values.

Reasonably high values.

By using scientific notation 9000 can be written as

9 x 10³

9 x 10²

9 x 10^-4

9 x 10⁴