Two solutions X and Y are tested with universal indicator. Solution X turns orange whereas solution Y turns red. Which of the solutions is a stronger acid?

Two solutions X and Y are tested with universal indicator. Soluti…

Give the symbol of an electric fuse used in circuit diagrams.

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You are given three bulbs of 40W, 60W and 100W. Which of them has lower resistance?

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Name the biomass which is still widely used as a source of heat energy in many households of our country.

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What is the other name of carpel of a flower?

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State an important advantage of alternating current over direct current.

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What type of compound is formed when a carboxylic acid reacts with an alcohol in the presence of cone. $H _2 SO _4$ ?

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What is the usual capacity of an electric fuse used (z) in the lighting circuit, and (ii) in the power circuit, of a small house?

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Select the hydrocarbons which are members of the same homologous series. Give the name of each series.
$C_5 H_{10}, C_3 H_8, C_6 H_{10}, C_4 H_{10}, C_7 H_{12}, C_8 H_{16}$

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When $SO_2$ gas is passed through saturated solution of $H_2S$, the following reaction occurs:$\text{SO}_2\ +\ \text{2H}_2\text{S}\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ }\text{2H}_2\text{O}\ +\ \text{3S}$
In this reaction, which substance is oxidised and which one is reduced?

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What type of chemical reactions take place when:
Lime-stone is heated?

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