SSC (Marathi Semi-English) इयत्ता १० वी - Maharashtra State Board Question Bank Solutions for Science and Technology 1

The reddish brown deposit formed on iron nails kept in a solution of copper sulphate is

1. Cu₂O
2. Cu
3. CuO
4. CuS

After you have dinner tonight, wash your own plates with soap/detergent.

1. What colour change is observed when soap/detergent is applied?
2. Name the type of reaction and explain it.

The device used for producing electric current is called a ______.

Write the answer of the question with reference to laws of gravitation.

State the universal law of gravitation.

Write the three laws given by Kepler. How did they help Newton to arrive at the inverse square law of gravity?

Explain the terms with examples.

Displacement reaction

Explain the construction and working of the following. Draw a neat diagram and label it.

Electric Generator (AC)

Explain the difference:
AC generator and DC generator.

Give a scientific reason.

Tungsten metal is used to make a solenoid type coil in an electric bulb.

Write the name from the description.

The period with electrons in the shells K, L, and M.

Give Scientific reason
In the electric equipment producing heat e.g. iron, electric heater, boiler, toaster etc, an alloy such as Nichrome is used, not pure metals.

Write the name from the description.

The group with valency zero.

Give a scientific reason:

For electric power transmission, copper or aluminium wire is used.

Give Scientific reason.

In practice, the unit kWh is used for the measurement of electrical energy, rather than joule.

Write the name from the description.

The family of metals having valency one.

Write the name from the description.

The family of metals having valency two.

Write the names from the description.

The metalloids in the second and third periods.

Write the names from the description.

Non-metals in the third period.

Write the names from the description.

Two elements having valency 4.

Identify the figure and give its use.