SSC (English Medium) १० वीं कक्षा - Maharashtra State Board Question Bank Solutions for Science and Technology 1

Draw electron dot structure for the following:

\[\begin{array}{cc}
\phantom{..}\ce{H}\phantom{........}\ce{H}\phantom{.}\\
\phantom{.}\backslash\phantom{......}/\phantom{}\\
\ce{C = C}\\
\phantom{}/\phantom{......}\backslash\phantom{}\\
\phantom{}\ce{H}\phantom{........}\ce{H}\phantom{}
\end{array}\]

How much is the relative humidity at the dew point?

The reaction of calcium carbonate, with freshly prepared lime water, is shown below:

Answer the questions with the help of a diagram:

1. What type of reaction does calcium carbonate undergoes?
2. What change in colour is observed in lime?
3. Write the chemical equation.

Balance the following equation.

\[\ce{Calcium chloride + Sulphuric acid -> Calcium sulphate + Hydrogen chloride}\]

Which of the following statement is incorrect with reference to the reaction of silver nitrate with sodium chloride?

Match the column:

Observe the given figure of a current-carrying solenoid and write the labels of A and B correctly.

Differentiate between: Absolute humidity and relative humidity.

Complete the co-relation:

CuI₂ : Brown : : AgCl : ______

How do we feel about air in each of the following conditions?

1. Relative humidity is more than 60%.
2. Relative humidity is less than 60%.

Complete the following reaction:

\[\ce{C_12H_22O11->[Heat]}\] ______ + ______.

Complete the following flow chart:

What is meant by a satellite launch vehicle?

Write the molecular formula of calcium carbonate.

Name any one Indian satellite launch vehicle.

Draw a neat diagram of a solenoid and name its various components.

Identify the hydrocarbon from the given electron-dot structure:

\[\begin{array}{cc}
\phantom{}\ce{H}\phantom{....}\ce{H}\phantom{}\\
\phantom{}\ce{H}\phantom{..}\ce{\text{}^\bullet_\bullet}\phantom{..}\ce{\overset{\bullet\phantom{.}\bullet}{\underset{\bullet\phantom{.}\bullet}{C}}}\phantom{..}\ce{\text{}^\bullet_\bullet}\phantom{..}\ce{\overset{\bullet\phantom{.}\bullet}{\underset{\bullet\phantom{.}\bullet}{C}}}\phantom{..}\ce{\text{}^\bullet_\bullet}\phantom{..}\ce{H}\phantom{}\\
\phantom{}\ce{H}\phantom{....}\ce{H}\phantom{}\\
\end{array}\]

Reaction of iron nails with copper sulphate solution is an example of
(a) Combination reaction
(b) Decomposition reaction
(c) Displacement reaction
(d) Double displacement reaction

An object of 10 cm is placed in front of a plane mirror. The height of image will be …………….
(a) 5 cm
(b) 15 cm
(c) 20 cm
(d) 10 cm

When a ray of light travels from air to glass slab and strikes the surface of separation at 90°, then it …………….
(a) bends towards normal
(b) bends away from normal
(c) passes unbent
(d) passes in zigzag way