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Test: Chemistry Mock Test - 5
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45 Questions MCQ Test NEET Mock Test Series | Test: Chemistry Mock Test - 5
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Test: Chemistry Mock Test - 5 - Question 3
Benzene reacts with CH3Cl in the presence of anhydrous AlCl3 to form:
Test: Chemistry Mock Test - 5 - Question 4
The value of the energy for the first excited state of hydrogen will be
Test: Chemistry Mock Test - 5 - Question 5
The ratio of the molar amounts of H₂S needed to precipitate the metal ions from 20 mL each of 1M Cd(NO₃)₂ and 0.5 M CuSO₄ is
Detailed Solution for Test: Chemistry Mock Test - 5 - Question 5
As Cd2+ and Cu2+, both are dipositive ions but Cu2+ has one half of the concentration compared to that of the Cd2+. Thus, the molar amount of the H2S used to precipitate the metals ions Cd2+ and Cu2+ is 2 : 1.
Test: Chemistry Mock Test - 5 - Question 6
On heating with conc. HNO₃, proteins give yellow colour. This test is called
Test: Chemistry Mock Test - 5 - Question 8
The work done during expansion of a gas from a volume of 4 dm3 to 6 dm3 against a constant external pressure of 3 atm (1 L-atm = 101.32 J)
Test: Chemistry Mock Test - 5 - Question 9
In which of the following case,does the reaction go farthest completion ?
Detailed Solution for Test: Chemistry Mock Test - 5 - Question 9
∵ higher the equilibrium constant , fastest the rate of reaction to completion.
for understanding this concept let see one example .
A + B ⇄ C + D
Equilibrium constant , K = [C][D]/[A][B]
For fastest completion of reaction numerator of RHS will be higher the denominator . Means higher the numberator , higher will be equilibrium constant and higher will be rate of reaction to completion.
Test: Chemistry Mock Test - 5 - Question 11
Variation of heat of reaction with temperature is known as
Test: Chemistry Mock Test - 5 - Question 14
The atomic radius of elements of which of these would be nearly same
Detailed Solution for Test: Chemistry Mock Test - 5 - Question 14
The atomic radii of the d- block elements of a given series decrease with increase in atomic number but this decrease becomes small after midway. The decrease in atomic radii in the beginning, is due to an increase in nuclear charge from member to member which tends to reduce the size. At the same time, the addition of extra electrons to (n-1)d orbitals also provides the screening effect. As the number of d-electrons increases, the screening effect increases. Thus, there are operating two effects namely screening effect and nuclear charge effect which oppose each other. In the midway onwards of the series both these effects become nearly equal and thus, there is no change in atomic radii inspite of the fact that atomic number increases gradually.
Test: Chemistry Mock Test - 5 - Question 16
Which of the following transition metal has the highest melting point?
Test: Chemistry Mock Test - 5 - Question 17
The element, which forms oxides in all oxidation states + 1 to + 5, is
Test: Chemistry Mock Test - 5 - Question 19
If 0.44 g of a colourless oxide of nitrogen occupies 224 ml at 1520 mm hg and 273oC, then the compound is
Test: Chemistry Mock Test - 5 - Question 20
Which one of the following metallic hydroxides does not dissolve in sodium hydroxide solution?
Test: Chemistry Mock Test - 5 - Question 23
With respect to protonic acids, which of the following statements is correct?
Test: Chemistry Mock Test - 5 - Question 24
Aqueous solution of hydrogen sulphide and sulphur dioxide when mixed together ,yield
Test: Chemistry Mock Test - 5 - Question 25
Iodine readily dissolves in potassium iodide solution giving
Test: Chemistry Mock Test - 5 - Question 27
The test used for identifying carbon-carbon double bond in an alkene
Test: Chemistry Mock Test - 5 - Question 28
Which one of the following processes will produce hard water ?
Test: Chemistry Mock Test - 5 - Question 31
The correct structure of 4-bromo-3-methyl-but-1-ene
Test: Chemistry Mock Test - 5 - Question 32
Hydrolysis of trichloromethane with aqueous KOH gives
Test: Chemistry Mock Test - 5 - Question 35
The type of isomerism exhibited by pentamminenitro chromium (III) chloride is
Test: Chemistry Mock Test - 5 - Question 37
Which of the following compounds to does not show Lassaigne's test for nitrogen?
Test: Chemistry Mock Test - 5 - Question 38
Modern Periodic Table is based on atomic no. of elements. The significance of atomic no. was proved by the experiment of
Detailed Solution for Test: Chemistry Mock Test - 5 - Question 38
Moseley in 1912 measured the frequencies of X-rays emitted by a metal when bombarded with high speed electrons. He discovered that the square root of the frequency of the more prominent X-rays emitted by a metal was proportional to the atomic number and not the atomic weight of the atom of the metal. He thus concluded that atomic number was a more fundamental property of an element than its atomic weight. This forms tha basis of the modern periodic law.
Test: Chemistry Mock Test - 5 - Question 40
Ionic solids with Schottky defects contain in their structure
Test: Chemistry Mock Test - 5 - Question 41
The vapour pressure of two liquids P ans Q are 80 and 60 torr, respectively. The total vapour pressure of solution obtained by mixing 3 moles of P and 2 moles of Q would be
Test: Chemistry Mock Test - 5 - Question 42
Which of the following compounds exhibit cis and trans forms?
Test: Chemistry Mock Test - 5 - Question 44
Which of the following is less than zero during adsorption?
Test: Chemistry Mock Test - 5 - Question 45
Colourless solutions of the following four salts are placed separately in four different test tubes and a strip of copper is dipped in each one of these. Which solution will turn blue ?
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