List of practice Questions

Consider the reaction:VO + Fe2O3 → FeO + V2O5Calculate the weight of FeO produced from 2 g of VO and 5.75 g of Fe2O3.[Take atomic weights of V and Fe to be 51 u and 56 u, respectively.]
In the titration of Fe2+ ions versus Cr2O72– ions using diphenylamine as the internal indicator, phosphoric acid is added in the solution containing Fe2+ ions. The role of phosphoric acid is to
The variation of pH during the titration of 0.5 N Na2CO3 against 0.5 N HCl is shown in the following graph:
The following table indicates the colour and pH range of different indicators:
Based on the given graph and table, which of the following statements are correct?a. The first point of inflection can be detected by cresolphthalein.b. The complete neutralisation can be detected by bromothymol blue.c. The second point of inflection can be detected by bromocresol red.d. The volume of HCl required for the first point of inflection is half of the volume of HCl required for the second point of inflection.
When 0.001 M Na2SO4 solution is saturated with CaSO4, its conductivity increases from 2.6 x 10-4 S cm-1 to 7.0 x 10-4 S cm-1. If the molar conductivities of Na+ and Ca2+ respectively are 50 S cm2 mol-1 and 120 S cm2 mol-1, then the solubility product of CaSO4 is:[Assume that conductivity of water used is negligible.]
The equation of the locus of the point of intersection of the straight lines x sin θ + (1 – cos θ) y = a sin θ  and x sin θ – (1 + cos θ) y + a sin θ = 0 is 
For the function f(x)= ecosx , Rolle’s theorem is
 If x2+y2=4, then ydydx+x=
For the real parameter t, the locus of the complex number z=(1−t2)+i1+t2
If x+1x=2cos⁡θ, then for any integer n,xn+1xn=
Feeling of weightlessness in a satellite or spaceship is due to
Two lead balls of masses m and 5m having radii R and 2R are separated by 12R, If they attract.each other by gravitational force, the distance covered by small sphere before they touch each other is
Pratyush took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over it, as shown in figure below.
  1. What will be the action of gas on 
    (i) dry litmus paper? 
    (ii) moist litmus paper?
  2. Write a balanced chemical equation for the reaction taking place.
    An experiments with sulphur powder on a spatula and heated
If l, m, and n are real numbers such that \(l + m = 10lm, m + n = 12mn\), and \(n + l = 4nl\), then find the value of \(\frac{180lmn}{lm+mn+nl}\).
Which of the following films has been adjudged as the Best Feature Film for the year in the 69th National Film Awards in New Delhi?
In october 2023, which of the following villages awarded the title of “Best Tourism Village of India 2023” by the Union Ministry of Tourism?
Which of the following state governments is associated with the ‘Mukhyamantri Gramin Awas NYAY Yojana’?
Who among the following Bollywood actresses was appointed as brand ambassador of Japanese apparel retailer Uniqlo?
In October 2023, who among thee following appointed as the Chairman of the Association of Mutual Funds in India (AMFI)?
Which of the following countries won the gold medal in equestrian in Asian Games 2023
The International Day for the Total Elimination of Nuclear Weapons is observed every year on_______.
Who won the Nobel Prize in Chemistry in 2023?
Which gulf divides the Kathiawar peninsula to the west from the eastern part of Gujarat state on the east?
What is the currency of Israel?
The concept of Fundamental Duties has been taken from the constitution of which country?
Tan Kim Her belongs to which country who has been appointed as India's doubles coach in badminton till the Asian Games in 2026?