Question 1 :
A student performs a titration with different burettes and finds titre values of 25.2 mL, 25.25 mL, and 25.0mL. The number of significant figures in the average titre value is
Question 2 :
Number of mole of 1 <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7fe38fdd8313cc8726aac"> gas at NTP are:
Question 4 :
The number of mole present in 2 litre of 0.5 <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7fcdcfdd8313cc872674e"> NaOH is:
Question 5 :
The molarity of a solution is 0.2 M when 18 g of glucose is dissolved in 500 ml of water.
Question 6 :
Stoichiometric ratio of sodium dihydrogen orthophosphate and sodium hydrogen orthophosphate required for synthesis of <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7fed1a3d2442ab82937d8"> is
Question 7 :
Which one of the following set of units represents the smallest and largest amount of energy respectively?
Question 8 :
The ratio of mole fraction of a solute and a solvent in a binary solution is:
Question 9 :
A solution of known normality is diluted to two times. Which of the following changes during dilution?
Question 10 :
Semimolar solution contains how many moles of solute in 1L of solution?
Question 11 :
The molarity of a solution obtained by mixing $250\ ml$ of $0.5M\ HCl$ with $750\ ml$ of $2M\ HCl$ is:
Question 12 :
A 5 molar solution of ${ H }_{ 2 }S{ O }_{ 4 }$ is diluted form $1 L$ to $10 L$. What is the normality of the solution?
Question 13 :
A 6.90 M solution of KOH in water contains $30\%$ by mass of KOH. Calculate the density of the solution.
Question 14 :
$35.4\ mL$ of $HCl$ is required for the neutralization of a solution containing $0.275\ g$ sodium hydroxide. The molarity of hydrochloric acid is:
Question 15 :
What is the mole fraction of glucose in $10\%\ w/W$ glucose solution?
Question 16 :
A $5.0$ mL solution of $H_{2}O_{2}$ liberates $0.508$ g of iodine from an acidified $KI$ solution. The strength of $H_{2}O_{2}$ solution in terms of volume strength at $STP$ will be :
Question 17 :
If 25 mL of a $H_2SO_4$ solution reacts completely with 1.06 g of pure $Na_2CO_3$, what is the normality of this acid solution?
Question 19 :
What $\%$ of the carbon in the $H_2CO_3-HCO^-_3$ buffer should be in the form of $HCO^-_3$ so as to have a neutral solution? $(K_a=4\times 10^{-7})$
Question 20 :
100 ml of 10V $H_2O_2$ solution is heated. The evolved gas is completely reacted with Ca to form CaO. The aqueous solution of Cao is neutralised by 50 ml of $H_2SO_4$ solution. The molarity of $H_2SO4$ is: