List of practice Questions

Two isotonic solutions cannot have the same value of
An aromatic compound will
(A) have (4n+2) \(\pi\) electrons
(B) be conjugated
(C) be planar
(D) be cyclic
Choose the correct answer from the options given below:
…………is the breaking down of long chain hydrocarbons into smaller molecules.
Which of the following set consists of only planar species?
Which of the following is the most reactive aldehyde towards nucleophilic addition reactions?
The Russian Chemist, Mendeleev, is remembered for organizing the elements into periodic table. He received many honours, the greatest of which is having an element named after him. Element Mendelevium.
Which of the following is not a characteristic of a catalyst?
Reduction has taken place if a substance......
Reaction of alkanes with halogens such as chlorine and bromine proceeds through.......
Which of the following physiological effects is caused in plants by gibberellic acid?
Which of the following is incorrect about racemic mixture?
Malignant cancer cells have all of the following properties except
How do eukaryotic genome differ from prokaryotic genomes?
Each individual antigenic determinant of the variable region of the antibody is referred to as:
Superoxide dismutase is involved in the conversion of
Which of the following is not a characteristic of a secondary immune response?
Widal test is designed specifically for the diagnosis of
The genetic material in retroviruses are
Barr body is found in
Micro-organisms responsible for nitrification are
BCXHADBT is written as 23681422 in a certain code. How is KTLVPTBA written in that code?

निम्नलिखित विषय पर संकेत बिंदुओं के आधार पर लगभग 120 शब्दों में एक अनुच्छेद लिखिए |
डिजिटल इंडिया

संकेत बिंदु - 
डिजिटल इंडिया क्या है 
डिजिटल होने के लाभ 
सरकार द्वारा उठाए गए कदम

'मैं क्यों लिखता हूँ' पाठ के आधार पर लिखिए कि कृतिकार के स्वभाव और आत्मानुशासन का लेखन में क्या महत्त्व है ?

Student to attempt either option-(A) or (B):
(A) Write the features a molecule should have to act as a genetic material. In the light of the above features, evaluate and justify the suitability of the molecule that is preferred as an ideal genetic material. 
OR 
(B) Differentiate between the following:

  • [(i)] Polygenic Inheritance and Pleiotropy
  • [(ii)] Dominance, Codominance and Incomplete dominance

At room temperature, the energy band gap of different materials have been listed in the table below. Correctly match the energy band gap (List-I) with the corresponding material (List-II). 

LIST-I (Energy band gap)  LIST-II (Material)
A. \( E_g = 0.67 \) eVI. Polymer
B. \( E_g = 1.1 \) eVII. Germanium
C. \( E_g = 1.43 \) eVIII. Silicon
D. \( E_g > 5 \) eVIV. Gallium Arsenide