Punjab Police Constable Mock Test - 6 Free Online Test 2026

When the price elasticity of demand is greater than 1, it indicates that demand is elastic, meaning a change in price leads to a relatively larger change in quantity demanded.

The function of a spectrophotometer is (b) measuring light intensity. A spectrophotometer is an instrument used to measure the amount of light absorbed or transmitted by a substance at various wavelengths. It is commonly used in chemistry and biology to determine the concentration of a substance in a solution by measuring the intensity of light absorbed or transmitted by the sample.

The instrument used to measure atmospheric pressure is (c) barometer. A barometer is specifically designed to measure atmospheric pressure, which is the force exerted by the weight of the air in the atmosphere. It is often used in weather forecasting and can help indicate changes in weather patterns.

A turning green with China rose indicator suggests that it is a basic solution. China rose indicator is a pH indicator that changes color in the presence of acidic and basic solutions. In this case, the green color indicates that solution A has a basic nature.

B remaining colorless with China rose indicator suggests that it is a neutral solution. The lack of color change indicates that solution B has a pH value close to 7, which is considered neutral on the pH scale.

C turning dark pink in color with China rose indicator suggests that it is an acidic solution. China rose indicator turns pink or dark pink in the presence of acidic solutions, indicating that solution C has an acidic nature.

• Lime juice is basically citric acid found in lemon and baking soda is Sodium Bicarbonate. 
• When these two react, salt and water along with carbon dioxide are formed. 
• This carbon dioxide is the reason for brisk effervescence observed when the reaction takes place. 
• Carbon dioxide is a heat-trapping gas released in large quantities from the burning of fossil fuels, industries, and other human activities. 
• C₆H₈O₇ (Citric Acid) + 3NaHCO₃ (Baking Soda) ⇒ 3CO₂(gas) + 3H₂O (water) + Na₃C₆H₅O₇ (Salt- Sodium citrate)

Gregor Johann Mendel, an Austrian scientist and Augustinian friar, is commonly referred to as the "Father of Genetics." He conducted groundbreaking experiments with pea plants in the mid-19th century and formulated fundamental laws and principles of heredity. His work laid the foundation for modern genetics and the understanding of how traits are inherited from one generation to the next. Mendel's discoveries were initially overlooked but were rediscovered and recognized as significant contributions to the field of genetics in the early 20th century.

Carbon dioxide: Carbon dioxide (CO₂) is the primary greenhouse gas responsible for global warming. It is released into the atmosphere through various human activities, including the burning of fossil fuels (such as coal, oil, and natural gas), deforestation, and industrial processes.

Decibels: Noise pollution is measured in decibels (dB). Decibels represent the intensity or loudness of sound. Different levels of noise can have varying effects on human health and well-being.

India’s logistics performance has shown significant improvement, ranking 38th out of 139 countries in the World Bank’s 2023 Logistics Performance Index, a climb of six places since 2018 and sixteen places since 2014. This data, shared by Union Minister Shri Som Parkash, highlights advancements in Customs, Infrastructure, Logistics Services, Shipment Arrangement, Tracking, and Timeliness. Initiatives like the PM GatiShakti National Master Plan and the National Logistics Policy, along with digital reforms like the Unified Logistics Interface Platform, contribute to this positive trend.

Pyarelal Sharma, the renowned musician, has been honored with the Laxminarayan International Award at the Global Music Festival. Presented by L Subramaniam and Kavita Krishnamurthy Subramaniam, Pyarelal is a highly successful Hindi cinema composer with an illustrious eight-decade career. The award recognizes his outstanding contributions to the world of music.

Scientists at the University of California, Riverside, reveals a potent ally in pest control – a new nematode species, Steinernema adamsi. Belonging to the Steinernema family, known for insect parasite control without pesticides since the 1920s, this species is beneficial, infecting and killing harmful insects by releasing pathogenic bacteria. Harmless to humans, Steinernema adamsi offers sustainable agricultural solutions against crop pests.

Russian forces recently launched a 3M22 Zircon missile targeting Kyiv. The 3M22 Zircon is a scramjet-powered hypersonic cruise missile developed in Russia, boasting speeds up to Mach 9 and a 1000 km range. It features a two-stage design with solid fuel in the first stage and a scramjet motor in the second. The missile employs cooled supersonic combustion ramjet engines, creating a plasma cloud during flight for radar invisibility. It differs from other hypersonic weapons like China’s DF-17 or Russia’s Avangard, using an active and passive radar seeker guidance system.

Alok Sharma, a senior IPS officer, has been appointed as the new director of the Special Protection Group (SPG), succeeding the late SPG chief Arun Kumar Sinha.

Ashok Vaswani is set to become the Managing Director & CEO of Kotak Mahindra Bank, beginning a three-year term on January 1, as announced by the bank's Board of Directors.

B. N. Goswamy, who passed away at the age of 90, was a renowned art historian and prolific writer, leaving behind a legacy that enriched the understanding of Pahari paintings.

Cyclonic storm 'Midhili' is currently affecting the Northeast Bay of Bengal, leading to alerts and disruptions in the region.

Suppose the man works overtime for x hours.

Now, working hours in 4 weeks = (5 x 8 x 4) = 160.

∴ 160 x 2.40 + x x 3.20 = 432

⇒ 3.20x = 432 - 384 = 48

⇒ x = 15.

Hence, total hours of work = (160 + 15) = 175.

Last 20 number = 12th to 31st
So remaining is 11th number.
So the answer = 31 × 57 – 10 × 50 – 20 × 61 = 47
Hence, Option D is correct.

Correct Answer- Option A