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

Answer the questions based on the equation below:

\[\ce{CH3 - CH2 - OH ->[{[O]}][K2Cr2O7/H2SO4] CH3 - COOH}\]

1. What type of reaction is it?
2. What is the role of the chemical written on the arrow?
3. Give one example of one such type of chemical as in answer (b).

In reference to the figure, answer the following questions:

1. What does the figure illustrate?
2. Explain the temperature changes observed in two objects.
3. Write the principle behind this concept.

It is recommended to use air tight containers for storing oil for a long time.

The power of convex lens of focal length 20 cm is ______.

Complete the following reaction:

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

Define periods of modern periodic table.

Define groups of modern periodic table.

Distinguish between Concave lens and Convex lens.

Distinguish between:

Concave lens and Convex Lens

Select the appropriate options and complete the following paragraph:

(metals, non-metals, metalloids, four, seven, s-block, p-block, d-block, f-block).

On the basis of electronic configuration, elements in the modern periodic table are classified Into ______ blocks. Groups 1 and 2 elements are included in ______ and all these elements are metals. (except Hydrogen). Group 13 to 18 elements are included in ______. This block contains metals, non-metals and metalloids. Group 3 to 12 elements are included in ______ and all the elements are ______ elements shown at the bottom of the periodic table i.e. Lanthanides and Actinides constitute ______ and all these elements are metals.

Write the molecular formula of calcium carbonate.

Distinguish between Concave lens and Convex Lens.

Distinguish between:

Concave lens and Convex Lens

Distinguish between:

Concave lens and Convex Lens

Distinguish between:

Concave lens and Convex lens

Distinguish between:

Concave lens and Convex lens

Distinguish between:

Concave lens and Convex lens

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

State four most common electrical appliances based on heating effect of electric current. Why do we use finely heated platinum wire in surgery?

CuSO_4(aq) + Zn_(s) → ZnSO_4(aq) + Cu_(s) is an example of a decomposition reaction.