Looking for the uhs past papers of 2015 ofChemistry portion? If yes then you are at right page because here we have published UHS MCAT Chemistry Past Papers 2015.
45- ‘Ka` values of few organic acids are given :
The order of acid strength is :
The Structure is
50- Select the correct zwitter ionic structures of an amino acid ?
51- Which one of the following amino acids is basic in nature ?
53- How many moles of sodium are present in 0.1g of sodium?
56- If the volume of a gas collected at a temperature of 600C and pressure of 1.05×105 Nm-2 is 60dm3 what would be the volume of gas at STP (P=1.01×103Nm-2,T=273K)?
60- The half life of N2O5 at C0 is 24 minutes. How long will it take for sample of N2O5 to decay to 25% of its original concentration?
According to Le Chatelier`s Principle
73- Which one of the following is a powerful electrophile used to attack on the electrons of benzene ring?
In the above reaction, the configuration of product is
84- Both aldehydes and ketones are planer to the neighborhoods of carbonyl (C=O) group. Which one of the following bonds is distorted towards the oxygen atoms?
90- Out of these which nitrogen base is NOT present in DNA
45- ‘Ka` values of few organic acids are given :
The order of acid strength is :
- A) CCL3COOH>CHCl2COOH > CH2ClCOOH > CH3COOH
- B) CH3COOH>CHCl2COOH>CCl3COOH>CH2ClCOOH
- C) CHCl2COOH > CH3COOH > CCl3COOH > CH2ClCOOH
- D) CCl3COOH > CH3COOH> CHCl2COOH>CH2CLCOOH
- HCOOC2H5
- CH3-CH=CH2
- CH3CH2OH
- H3C-CH2-COOH
- H2SO4/HgSO4
- V2O5
- LiAlH4
- K2Cr2O7/H2SO4
The Structure is
- Gly-Ala (dipeptide)
- Asp-Gly (dipeptide)
- Gly-Val (dipeptide)
- Asp-Val (Dipeptide)
50- Select the correct zwitter ionic structures of an amino acid ?
51- Which one of the following amino acids is basic in nature ?
- Glycine
- Alanine
- Lysine
- Glutamic acid
53- How many moles of sodium are present in 0.1g of sodium?
- 3 × 10-3
- 03× 10-1
- 01× 10-2
- 3× 10-2
- 18amu
- 18amu
- 18amu
- 20amu
56- If the volume of a gas collected at a temperature of 600C and pressure of 1.05×105 Nm-2 is 60dm3 what would be the volume of gas at STP (P=1.01×103Nm-2,T=273K)?
- 25cm3
- 75cm3
- 100cm3
- 51cm3
- 4s<4p<4d<4f
- 4p<4s<4f<4d
- 4s<4f<4p<4d
- 4f<4s<4d<4p
60- The half life of N2O5 at C0 is 24 minutes. How long will it take for sample of N2O5 to decay to 25% of its original concentration?
- 24 mins
- 72 mins
- 120 mins
- 48 mins
- 6×10-3 moldm-3 sce-1
- 6 ×10-4 moldm-3 sce-1
- 6 ×10-2 moldm-3 sce-1
- 6 ×10-5 moldm-3 sce-1
- Al+3
- Si+4
- Mg+2
- Na+1
- N>C
- P>Si
- Ar>Cl
- Li>Be
- I2+2Clà Cl2+I–
- Br2+2I–—-àI2+2Br–
- Cl2+2F–àF2+2Cl–
- I2+2Br–àBr2+Br2+2I–
- Oxygen and Nitrogen
- Nitrogen and Helium
- Helium and Oxygen
- Helium and Hydrogen
- Yellow and Red light
- Yellow and Blue light
- Red and white light
- Red and blue light
- [Xe] 4f14,5d10,6s1
- [Xe]4f10,5d10,6s2
- [Xe]4f14,5d9,6s2
- [Xe]4f14,5d10,6s2
- Explosives
- Fertilizers
- Nylon
- Polymers
- NH2CO
- N2H5CO2
- N2H4CO2
- N2H4CO
According to Le Chatelier`s Principle
- Reaction must not be temperature dependent
- Reaction must be carried out at room temperature
- Reaction must be carried out at low temperature
- Reaction must be carried out at high temperature
- 65%
- 35%
- 20%
- 58%
73- Which one of the following is a powerful electrophile used to attack on the electrons of benzene ring?
- FeCl2
- FeCl4–
- Cl+
- Cl2
- HBr>HI>HCl
- HI>HBr>HF
- HF>HI>HCl
- HI>HBr>HCl
- Alicyclic hydrocarbons
- Aromatic hydrocarbons
- Acyclic Hydrocarbons
- Heterocyclic hydrocarbons
- 1-Chloro-2-methylpropane
- 1-Chloro-2-methylbutane
- Isobutyl chloride
- 2-Methyl-3-chloropropane
In the above reaction, the configuration of product is
- 100% same of the configuration of reactant
- 50% retained
- 50% inverted
- 100% opposite from configuration of reactant
- Phenol
- Ether
- Ethanol
- Methanol
- Methanol
- Lactic acid
- Pyridine
- Acetone
- By lucas test
- By silver mirror test
- By oxidation
- By idoform test
- Calcium oxide
- Calcium chloride
- Calcium carbonate
- Carbon monoxide
- Fehling`s soloution test
- Idoform test
- Tollen`s reagent
- Benedict`s solution tests
84- Both aldehydes and ketones are planer to the neighborhoods of carbonyl (C=O) group. Which one of the following bonds is distorted towards the oxygen atoms?
- Π bond of C and O
- Sigma bond of C and H
- Sigma bond of C and O
- Sigma bond of C and C
- 1
- 3
- 2
- 4
- Co-factor
- Prosthetic group
- Isoenzyme
- Substrate
- Hexane-1,5-diamine
- Hexane-1,6-diamine
- Hexane-1,4-diamine
- Hexane-2,5-diamine
- Genetic protein
- Building protein
- Transport protein
- Structural protein
90- Out of these which nitrogen base is NOT present in DNA
- Adenine
- Guanine
- Uracil
- Thymine
- Polyamide
- Polystyrene
- Polyvinyl acetate
- Polyvinyl chloride
- N
- S
- O
- C
- Metals
- Grass
- Paper
- Plastic
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