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

Explain the following reaction with the balanced equation.

Dry aluminium hydroxide is ignited at 1000 °C

Explain the following reaction with the balanced equation.

Zinc sulphide is heated strongly in excess of air

Explain the following reaction with the balanced equation.

Zinc carbonate is heated strongly in limited supply of air

Explain the following reaction with the balanced equation.

Zinc oxide is treated with carbon

Explain concept with example/explain with the help of a balanced equation.

Ionic bond and ionic compounds

Explain concept with example/explain with the help of a balanced equation.

Roasting

Explain concept with example/explain with the help of a balanced equation.

Calcination

Complete flow chart given below.

An object is placed vertically at a distance of 20 cm from a convex lens. If the height of the object is 5 cm and the focal length of the lens is 10 cm, what will be the position, size and nature of the image? How much bigger as compared to the object?

Observe the given below the figure, correct it and explain and write about the concept depicted in this figure.

Given below is a diagram showing a defect of vision. Name the defect of vision and draw an accurately labelled diagram to correct this defect.

Observe the following diagram and write answers.

1. Name the method.
2. Write anode reaction and cathode reaction.
3. Why fluorspar and cryolite are added in the mixture?

Read the following passage and answer the questions.

According to the reactivity series, zinc is more reactive than iron, iron is more reactive than silver. During study of this, a student dipped the iron nails in silver nitrate solution.

1. What is reactivity series?
2. What will happen when iron nails are dipped in silver nitrate solution?
3. Which type of reaction happens when iron metal reacts with silver nitrate solution?
4. What will happen if a zinc rod is used instead of iron nail?

Balance the given chemical reaction as per the instructions below.

\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]

Oxidation means losing electrons then what is reduction?

Explain in brief types of extraction of highly reactive metals according to their reactivity.

Explain in brief types of extraction of moderately reactive metals according to their reactivity.

Explain in brief types of extraction of less reactive metals according to their reactivity.

Explain Bayer’s process of concentration of bauxite with a chemical equation.

Explain in brief electrolytic reduction of alumina with a neat labelled diagram.

Observe the figure and answer the following.

1. Write the name of the method.
2. What is used as anode and cathode in this method?
3. Write the molecular formula and use of cryolite.
4. Write anode reaction.
5. Write cathode reaction.