Navigation Menu
Home
University Admissions
Public Sector
Private Sector
Admissions in Punjab
Admissions in KPK
Admissions in Sindh
Admissions in Balochistan
Admissions in AJK
Global Scholarships
Scholarships in USA
Scholarships in UK
Scholarships in Canada
Scholarships in Australia
Scholarships in Europe
Scholarships in Asia
Scholarships in Africa
Medical Colleges
Public Sector
Private Sector
Semi-Govt (NUMS)
Online Quiz
MDCAT Past Papers
MDCAT Practice Test
AFNS Intelligence Test
ISSB Intelligence Test
Blog
Latest Notices
Menu
Pak
Admissions
Home
All Open Admissions
Public Sector
Private Sector
Admissions in Punjab
Admissions in KPK
Admissions in Sindh
Admissions in Balochistan
Admissions in AJK
Scholarships
Scholarships in USA
Scholarships in UK
Scholarships in Canada
Scholarships in Australia
Scholarships in Europe
Scholarships in Asia
Scholarships in Africa
Medical and Dental Colleges
Public Sector
Private Sector
Semi-Govt (NUMS)
Online Quiz
MDCAT Past Papers
MDCAT Practice Test
AFNS Intelligence Test
ISSB Intelligence Test
Blog
Latest Notices
Home
/
Online Quiz
/
MDCAT Past Papers
/
Quiz 214
Mdcat-past-papers Quiz
Filters:
All questions
4261. Which of the following will give iodoform reaction on treatment with Na₂CO₃ and I₂?
Methanol
Acetic acid
Acetic anhydride
Acetone
4262. When Aldehyde reacts with 50% NaOH, this reaction is called as:
2,4-DNPH reaction
Aldol condensation reaction
Clemmensen reaction
Cannizzaro's reaction
4263. The hydrate percentage is maximum for:
Propanal
Acetone
Formaldehyde
Acetaldehyde
4264. The carbonyl group of aldehyde and ketone are reduced to -CH₂ using reagent:
Dry HCl
LiAlH₄
NaBH₄
N2H4/KOH
4265. 50% NaOH is used in which reaction:
Cannizzaro's reaction
Halogenation
Nitration
None
4266. Cannizzaro's reaction is given by:
Formaldehyde
Acetaldehyde
Acetone
Butanone
4267. Compound A + I₂ + Na₂CO₃ → Compound B + RCOONa + NaI + H₂O. Identify compound B:
Acetone
Acetic acid
Acetamide
Acetic anhydride
4268. Which of the following will give a positive test with Tollen's reagent?
Aldehydes
Tertiary alcohols
Ketones
Carboxylic acids
4269. Tollen's reagent is ammonical silver nitrate solution, which identifies a functional group X with observation O. Identify X and O:
X = Ketone, O = Grey precipitate
X = Ketone, O = Silver mirror
X = Aldehyde, O = Silver mirror
X = Aldehyde, O = Red precipitate
4270. The appearance of silver mirror in Tollen's test indicates the presence of which of the following?
Ketone
An acid
Aldehyde
Alcohol
4271. The blue color of Fehling's solution changes to red when warmed with an aldehyde due to the formation of:
NO₂
Cu₂O
Ag
SO₂
4272. Reaction of HCN with formaldehyde is a/an:
Nucleophilic addition reaction
Nucleophilic substitution reaction
Electrophilic addition reaction
Electrophilic substitution reaction
4273. Which of the following is formed when formaldehyde is treated with oxidizing mixture (H₂SO₄ + K₂Cr₂O₇)?
Methanol
Methanoic acid
Acetone
Acetaldehyde
4274. Aldehydes cannot be easily oxidized by:
K₂Cr₂O₇
H₂SO₄
KMnO₄
HCl
4275. Aldehydes do not give which identification test:
2,4-DNPH test
Sodium Nitroprusside Test
Tollen's Test
Fehling's Solution
4276. Oxidation of propanol in the presence of K₂Cr₂O₇/H₂SO₄ produces:
Propanol
Propanoic acid
Propanone
Propene
4277. Silver Mirror with Tollen's Reagent is formed by:
Acid halides
Alcohols
Ketones
Aldehydes
4278. Ketones do not give ----- reactions.
Addition of NaHSO₃
Reduction by Fehling's solution
Formation of oxime
Reaction with hydrazine
4279. Sodium nitroprusside test is shown by:
Aldehydes
Ketones
Both can give this test
Cannot be shown by both
4280. Ketones undergo reduction to form:
Primary alcohol
Secondary alcohol
Tertiary alcohol
Both b & c
Submit Quiz
-
Try Now
MDCAT Past Papers Free Online Quizzes
Rs. 1,799
Buy Now
Watch Touch Screen With Bluetooth
Country Wise Scholarships
🇵🇰
Pakistan's Scholarships
🇺🇸
USA's Scholarships
🇬🇧
UK's Scholarships
🇨🇦
Canada's Scholarships
🇨🇳
China's Scholarships
🇸🇦
Saudi Arabia's Scholarships
🇦🇪
UAE's Scholarships
🇲🇾
Malaysia's Scholarships
🇪🇺
Europe's Scholarships
🇰🇷
South Korea's Scholarships
See More
Rs. 5,994
Buy Now
Zero® ICON Smartwatch
Online Free Quiz
MDCAT Past Papers
MDCAT Practice Test
AFNS Intelligence Test
ISSB Intelligence Test
View All Quizzes →
Follow Us
Facebook
YouTube
WhatsApp
Instagram
Stay updated with latest news & updates
Aggregate Calculator
Calculate your MDCAT aggregate for MBBS admissions
Calculate Now →