UHS MCAT Original MCAT Chemistry Paper 2015
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Original MCAT Paper 2015
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UHS MCAT 2015
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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
46- An organic acid ‘z` reacts separately with sodium bicarbonate , sodium hydroxide and sodium carbonate. Which one of the following represent the structure of ‘z`
47- Carboxylic acids are rather hard to reduce, which powerful reducing agent can be used to convert them to the corresponding primary alcohol
The Structure is
- Gly-Ala (dipeptide)
- Asp-Gly (dipeptide)
- Gly-Val (dipeptide)
- Asp-Val (Dipeptide)
49- Which one of the following structures shows the correct formula of glutamic acid ?
50- Select the correct zwitter ionic structures of an amino acid ?
51- Which one of the following amino acids is basic in nature ?
- Glutamic acid
52- The structural formula for alanine is
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
54- With the help of spectral data given calculate the mass of Neon and encircle the best option. (Percentage of10 Ne 20 , 21Ne21 and 10Ne22 are 90.92%,0.26% and 8.82% respectively)
55- Which graph represents Boyle`s law
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)?
57- There are four orbitals s, p, d and f. Which order is correct with respect to the increasing energy of the orbitals.
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
61- When the change in concentration is 6×10-4 moldm-3 and time for that change is 10 seconds, the rate of reaction will be
- 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
62- Which one of the following will have the smallest radius?
63- Keeping in view the size of atoms, which order is correct?
64- On the basis of oxidizing power of halogens, which reaction is possible?
- I2+2Clà Cl2+I–
65- Which one of the following gases is used as mixture for breathing by sea divers?
- Oxygen and Nitrogen
- Nitrogen and Helium
- Helium and Oxygen
- Helium and Hydrogen
66- [Ti(H2O)6]+3 transmits
- Yellow and Red light
- Yellow and Blue light
- Red and white light
- Red and blue light
67- Electronic configuration of Gold [Au79] is
- [Xe] 4f14,5d10,6s1
68- About 80% of ammonia is used for the production of
69- Urea is the most widely used nitrogen fertilizer in Pakistan. Its composition Is
70- During the manufacture of nitric acid, nitric oxide is oxidized to nitrogen dioxide. This reaction is given as :
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
71- What is the percentage of nitrogen in NH3NO3?
72- The structural formula of 2,3,4 trimethylpentane is :
73- Which one of the following is a powerful electrophile used to attack on the electrons of benzene ring?
74- Order of reactivity of alkenes with hydrogen halide is
75- The given three hydrocarbons are
- Alicyclic hydrocarbons
- Aromatic hydrocarbons
- Acyclic Hydrocarbons
- Heterocyclic hydrocarbons
76- The IUPAC name of the given compound is
- Isobutyl chloride
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
78- Which one of the following was used as one of the earliest antiseptic and disinfectant?
79- Which one of the following is NOT able to denature the ethanol?
- Lactic acid
80- How will you distinguish between methanol and ethanol?
- By lucas test
- By silver mirror test
- By oxidation
- By idoform test
81- To produce absolute alcohol(100%) from rectified spirit (95.6% alcohol), the remaining 4.4% water must be removed by a drying agent such as
- Calcium oxide
- Calcium chloride
- Calcium carbonate
- Carbon monoxide
82- Which one of the following is also called silver mirror test?
- Fehling`s soloution test
- Idoform test
- Tollen`s reagent
- Benedict`s solution tests
83- When acetaldehyde reacts with 2,4-dinitrophenylhydrazine (2,4-DNPH), which one of the following products is formed
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
85- in the given formula which one is alpha carbon atom ?
86- The specific substances (metabolite) that fits on the enzyme surface and is converted to products is called
- Prosthetic group
87- Polymide is formed due to the condensation od hexane-dioic acid with
88- Haemoglobin is a
- Genetic protein
- Building protein
- Transport protein
- Structural protein
89- Which one of the following polymer is polystyrene
90- Out of these which nitrogen base is NOT present in DNA
91- Which one of the following is an example of co-polymer?
- Polyvinyl acetate
- Polyvinyl chloride
92- The biggest source of acid rain is the oxide of
93- Burning of which one of the following waste is considered as useful industrial fuel or to produce electricity
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