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questions
List of practice Questions
Addition of a solute to pure water causes
Biology
Transport in Plants
Addition of HBr to 2-methyl-prop-1-ene in the presence of hydrogen peroxide mainly forms
Chemistry
Hydrocarbons
Acidified
$KMnO_4$
is dropped over sodium peroxide taken in a flask at room temperature, vigorous reaction takes place to produce
Chemistry
d -and f -Block Elements
Acidified potassium dichromate reacts with potassium iodide and oxidises it to
$I_2$
. What is the oxidation state of chromium in the products of the reaction?
Chemistry
d -and f -Block Elements
Across the lanthanide serie ,the basicity of the lanthanide hydroxides
Chemistry
d -and f -Block Elements
Acetylene reacts with acetic acid in presence of
$Hg^{++}$
ions at room temperature to give
Chemistry
Hydrocarbons
Achlamydeous flower is the one which possesses
Biology
Morphology of flowering plants
Acid rain is due to
Chemistry
Environmental Chemistry
Acidic hydrolysis of acetamide gives
Chemistry
Aldehydes, Ketones and Carboxylic Acids
Acetylation reaction of phenol gives
Chemistry
Alcohols, Phenols and Ethers
Acetylene is used in the large scale production of
Chemistry
Hydrocarbons
Acetooxime on reduction with
$LiAlH_4$
produces
Chemistry
Amines
Accumulation of which of the following in muscle causes fatigue?
Biology
locomotion and movement
Acetal is produced by reacting alcohol in the presence of dry HCl with
Chemistry
Aldehydes, Ketones and Carboxylic Acids
Acetic acid when treated with
$ {NH_3}$
forms ammonium acetate which on heating gives
Chemistry
Aldehydes, Ketones and Carboxylic Acids
Acetone reacts with Grignard Reagent to form
Chemistry
Aldehydes, Ketones and Carboxylic Acids
According to the law of triads,
Chemistry
Classification of elements and periodicity in properties
According to the modern concept, cell membrane is
Biology
Cell: the unit of life
According to Werner's theory, the primary valencies of the central metal atom
Chemistry
coordination compounds
According to the Hooke's law, the force required to change the length of a wire by 'l' is proportional to :
Physics
mechanical properties of solids
According to Lewis, the ligands are
Chemistry
coordination compounds
According to Newtons formula, the speed of sound in air at
$STP$
is (Take the mass of
$1$
mole of air is
$29 \times 10^{-3}\, kg$
)
Physics
Waves
According to second postulate of Bohr model, the angular momentum
$(L_n)$
of
$n^{th}$
possible orbit of hydrogen atom is given by
Physics
Atoms
According to the first law of thermodynamics,
$\Delta U = q + w$
. In special cases the statement can be expressed in different ways. Which of the following is not a correct expression?
Chemistry
Thermodynamics
According to Classical theory, the Rutherford model of atom is
Physics
Atoms
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