Observer the given experimental set-up carefully. Which of the following could be the possible observation and inference drawn?

The solution becomes blue-green due to formation of copper chloride, P is basic.

The solution becomes blue-green due to formation of copper oxide, P is acidic.

The solution becomes white due to formation of calcium oxide, P is acidic.

The solution becomes white due to formation of calcium hydroxide, P is basic

Match column I with column II and mark the correct option from the given codes. Column I Column II (a) NaHCO 3 (i) Used for disinfecting water (b) Na 2 CO 3 (ii) Used in soda-acid fire extinguishers (c) CaOCl 2 (iii) Used for removing permanent hardness of water (d) CaSO 4 1 2 H 2 O (iv) Used for making toys, materials for decoration

(a) - (ii), (b) - (iii), (c) - (i), (d) - (iv)

(a) - (iii), (b) - (i), (c) - (iv), (d) - (ii)

(a) - (iii), (b) - (ii), (c) - (i), (d) - (iv)

(a) - (i), (b) - (ii), (c) - (iv), (d) - (iii)

MEDIUM

10th Foundation

IMPORTANT

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A compound is prepared from gypsum upon heating to a temperature of $373 K$ and it changes back to gypsum on adding water. Which is the incorrect statement about the compound?

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Important Questions on Acids, Bases and Salts

MEDIUM

10th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 10>Chapter 2 - Acids, Bases and Salts>EXERCISES>Q 7

Select the incorrect statement.

HARD

10th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 10>Chapter 2 - Acids, Bases and Salts>EXERCISES>Q 8

Read the given passage and fill in the blanks by selecting an appropriate option.

Bleaching powder is a I powder. When exposed to air, it reacts with II of the air to liberate ${Cl}_{2}$ gas. It is III in cold water and the milkiness of the solution is due to the presence of unreached IV. It reacts with $HCl$ and $H_{2} {SO}_{4}$ liberating V gas.

	(i)	(ii)	(iii)	(iv)
(A)	Blue crystalline	Moisture	Soluble	${CO}_{2}$	${SO}_{2}$
(B)	Yellowish white	${CO}_{2}$	Soluble	Lime	${Cl}_{2}$
(C)	White	$O_{2}$	Insoluble	lime	${Cl}_{2}$
(D)	Yellow	Moisture	Soluble	${CO}_{2}$	${CO}_{2}$

EASY

10th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 10>Chapter 2 - Acids, Bases and Salts>EXERCISES>Q 9

Observer the given experimental set-up carefully.

Question Image

Which of the following could be the possible observation and inference drawn?

MEDIUM

10th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 10>Chapter 2 - Acids, Bases and Salts>EXERCISES>Q 10

Few statements regarding the properties of bases are given below. Mark the correct statements?

(i) Sodium hydroxide and potassium hydroxide are soluble in water.

(ii) Calcium hydroxide and magnesium hydroxide are partially soluble in water.

(iii) All metallic hydroxides react with acids to form their respective metallic salts.

(iv) Metallic oxides are acidic oxides hence they react with acids to form salts.

HARD

10th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 10>Chapter 2 - Acids, Bases and Salts>EXERCISES>Q 11

Read the given statements and mark the correct option.

Statement 1: A solution of $pH = 1$ has hydrogen ion concentration $3$ times than that of solution of $pH = 3$ .

Statement 2:

pH = - \log \frac{1}{[H_{3} O^{+}]}

HARD

10th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 10>Chapter 2 - Acids, Bases and Salts>EXERCISES>Q 12

Baking powder is a mixture of

X

and mild edible acid such as

Y

. When it is heated,

Z

is produced that makes bread and cake soft and spongy.

X, Y

and

Z

are respectively:

HARD

10th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 10>Chapter 2 - Acids, Bases and Salts>EXERCISES>Q 13

A metal carbonate $W$ on reacting with acid gives a gas $X$ which when passed through a solution $V$ gives the carbonate back. Solution $Y$ reacts with gas $Z$ to form a compound $P$ used for decolourisation. Identify $W, X, Y, Z$ and $P$ .

	W	X	Y	Z	P
(A)	$Na$	${CO}_{2}$	$NaOH$	${Cl}_{2}$	$NaCl$
(B)	${MgNa}_{2}$	$O_{2}$	$MgO$	${CO}_{2}$	${MgHCO}_{3}$
(C)	$K_{2} {Na}_{2}$	$O_{2}$	$KOH$	${CO}_{2}$	${KHCO}_{2}$
(D)	${CaCO}_{3}$	${CO}_{2}$	$Ca {(OH)}_{2}$	${Cl}_{2}$	${CaOCl}_{2}$

HARD

10th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 10>Chapter 2 - Acids, Bases and Salts>EXERCISES>Q 14

Match column I with column II and mark the correct option from the given codes.

	Column I		Column II
(a)	${NaHCO}_{3}$	(i)	Used for disinfecting water
(b)	${Na}_{2} {CO}_{3}$	(ii)	Used in soda-acid fire extinguishers
(c)	${CaOCl}_{2}$	(iii)	Used for removing permanent hardness of water
(d)	${CaSO}_{4} \frac{1}{2} H_{2} O$	(iv)	Used for making toys, materials for decoration

A compound is prepared from gypsum upon heating to a temperature of 373K and it changes back to gypsum on adding water. Which is the incorrect statement about the compound?

Important Questions on Acids, Bases and Salts

Learn and Prepare for any exam you want !

A compound is prepared from gypsum upon heating to a temperature of $373 K$ and it changes back to gypsum on adding water. Which is the incorrect statement about the compound?