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Quiz 198
Mdcat-past-papers Quiz
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3941. Heating a mixture of chromite or FeO•Cr₂O₃ and K₂CO₃ in air is to manufacture:
K₂MnO₄
KMnO₄
K₂CrO₄
K₂Cr₂O₇
3942. Metallic property in a group of P-block elements has a trend:
Decreases
Increases
Remains same
Irregular trend
3943. Which of the following alkali metals can form normal oxide as well as peroxide?
Na
K
Li
Cs
3944. The transition element which doesn't show variable valency:
Zn
Cu
Fe
Co
3945. The binding energy of transition metals increases up to group:
IIB
IVB
IIIB
VIB
3946. Which of the following have positive electron affinity?
Addition of electron to Cl
Addition of electron to O
Addition of electron to O⁻¹
Addition of electron to N
3947. The melting point of sulphur is higher than that of phosphorus because:
Sulphur has strong van der Waals forces
Sulphur has weak van der Waals forces
Phosphorus has strong van der Waals forces
Phosphorus has weak van der Waals forces
3948. Which one of the following noble gases will have highest boiling point?
Kr
Ar
Ne
He
3949. Which one is more metallic
Na
Mg
Cs
K
3950. Which of the following belongs to s-block?
K
Mn
F
S
3951. Oxidation number of element in free state:
1
-1
2
0
3952. Which of the following increase down the group for alkali metals:
Electronegativity
Electron affinity
Reactivity of alkali metals
Ionization energy
3953. All alkali metals react with chlorine gas to form white metal chlorides salt. Metal chloride salt formed is:
Insoluble
Soluble in water to give neutral solution of pH 7
Soluble in water to give acidic solution of pH 1
Soluble in water to give alkaline solution of pH 14
3954. Which of the following is amphoteric in nature:
Lithium oxide
Beryllium oxide
Calcium oxide
Potassium oxide
3955. Why fluorine has less electron affinity as compared to bromine?
Small size
Thick small electronic cloud
Seven electrons in outermost shell
Higher ionization energy
3956. Which of the following transition metal shows 3d⁵ configuration in its +2 oxidation state?
Cu²⁺
Mn²⁺
Fe²⁺
Zn²⁺
3957. Which of the following is NOT an alloy?
Steel
Brass
Bronze
Graphite
3958. Electronic configuration of chromium (Proton number 24) is:
[Ar] 3d⁴ 4s²
[Ar] 3d⁴ 4s²
[Ar] 3d⁵ 4s¹
[Ar] 3d⁶ 4s²
3959. Which of the following is NOT a property of transition elements?
High melting points
Good conductors of electricity
Hard metals
Ions and compounds are colorless
3960. Valence shell electronic configuration of an element is 4s² 4p⁶. To which group does the element belong?
IB
IIIB
IA
IIIA
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