Test Details

Acids, Bases and Salts

Dec 14, 10:05 PM

90 minutes

Dec 15, 11:00 PM

58.0 marks

MCQ

50 questions

SHREEJI ACADEMY

It is a institute where students will get proper knowledge of maths not by cramming but by understanding the concept.

Class Details

Maths

Science

GSP GROPU 10TH

Maths

Science

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Question Text

Question 3 :
$p{ K }_{ a }$ values of four acids are given below at ${ 25 }^{ o }C$. The strongest acid is:

Question 6 :
The acid present in the body of red ant is ________.

Question 7 :
Water of crystallization is the fixed number of water molecules chemically attached to a unit of a salt in its crystalline form.

Question 9 :
If $H^{+}$ion concentration of a solution is increasedby $10$ times, its $pH$ will :

Question 10 :
Assertion: pH of a neutral solution is always $7$. Reason: pH of a solution does not depend upon temperature.

Question 12 :
The solution of bleaching powder in water is always a clear solution.

Question 15 :
Four solutions A, B, C and D when tested with universal indicator showed pH as $4, 11, 7$ and $9$ respectively. Which one of the four solutions is neutral?

Question 17 :
In which of the following reactions does conc.${ H }_{ 2 }S{ O }_{ 4 }$ act as an oxidising agent?

Question 18 :
When $NH_{3}(0.1\ M) 50\ ml$ mix with $HCl (0.1\ M)\ 10\ ml$ then what is $pH$ of resultant solution $(Pk_{b} = 4.75)$.

Question 20 :
$1.0 \ L$ solution is prepared by mixing $61 \ gm$ benzonic acid $(pK_a = 4.2)$ with $72 \ gm$ of sodium benzoate and then $\text{300 mL 1.0 M HBr}$ solution was added. the $pH$ of final solution is:-

Question 21 :
Which colour appears when few drops of phenolphthalein put into test tube contains lime water?

Question 23 :
When the soil is too basic, plants do not grow well in it. To improve its quality what must be added to the soil?

Question 25 :
Calculate the pH of a solution which is 0.1 M in HA and 0.5M in NaA. Ka for HA is $1.8\times { 10 }^{ -6 }$?

Question 27 :
Aquaregia is prepared by mixing conc. $HCl$ and $conc. HNO_3$ in the ratio ________ 

Question 28 :
Effervescence is seen when a bottle of soda water is opened.

Question 29 :
$pK_{a}$ of acetic acid is 4.741. The concentration of $CH_{3}COONa$ is 0.01 M. The pH of $CH_{3}COONa$ is?

Question 30 :
Which of the following methods is adopted for preparing dilute solution of ${ H }_{ 2 }S{ O }_{ 4 }$?

Question 31 :
Which part of tooth, made up of calcium phosphate, is the hardest substance in the body?

Question 32 :
The hydrogen ion concentration of the oceans is about $2\times10^{-9}\space M$. What is the $pH$?

Question 37 :
The chloride salt of a certain weak monoacidic organic base is hydrolysed to an extent of $3$% in its $0.1M$ solution at ${25}^{o}C$. Given that the ionic product of water is ${10}^{-14}$ at this temperature, what is the dissociation constant of the base?

Question 38 :
If tartaric acid is not added in baking powder, the cake will taste bitter due to te presence of -

Question 42 :
Statement I: A basic solution has more hydrogen ions than an acidic solution. Statement II: pH is defined as the -log $[H^+]$.

Question 43 :
Assertion: Sodium bicarbonate is an acidic salt. Reason: It gives basic solution in water.

Question 44 :
Which of the following has the highest value of pH at the same temperature for the same concentration?

Question 45 :
Which of the following negative radical is present in bleaching powder?

Question 46 :
$10\ mL$ of a strong acid solution of $pH=2$ are mixed with $990\ mL$ of another acid solution of $pH=4$. The $pH$ of the following solution will be:

Question 49 :
Read the given statements and select the correct option: Statement 1 :Backing soda does not taste sour. Statement 2 :Bases are sour in taste while acids are bitter in taste.

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