Answer: A) Tibet Explanation: Second ozone hole was detected over Tibet in the year 2006.  Ozone is a form of oxygen, acts as a high-altitude atmospheric screen against cancer-causing ultraviolet light. The main source of these halogens in the stratosphere is photodissociation of man made halocarbon refrigerants, solvents, propellants and CFC's.

Answer: B) Siemens m2/equivalent Explanation: Equivalent conductance is defined as the conductance of an electrolyte solution containing one gram equivalent of the electrolyte. It is equal to the product of specific conductance (k) of the solution and the volume (V) of the solution that contains one gram equivalent of the electrolyte.    λ = k x V   Unit of spceific conductance k is Siemens / m. Volume of the solution V is m3 Now, required equivalent conductance unit is Siemens.m2/equivalent .

Answer: C) ATX व्याख्या: ATX (एडवांस्ड टेक्नोलॉजी एक्सटेंडेड) एक मदरबोर्ड फॉर्म फैक्टर है जो एक 20 पिन कनेक्टर का उपयोग करता है। एटीएक्स को इंटेल द्वारा 1995 में एटी फॉर्म फैक्टर जैसे पिछले वास्तविक मानकों में सुधार करने के लिए विकसित किया गया था। यह कई वर्षों में डेस्कटॉप कंप्यूटर एनक्लोजर, मदरबोर्ड और बिजली आपूर्ति डिजाइन में पहला बड़ा बदलाव था, जिससे भागों के मानकीकरण और विनिमेयता में सुधार हुआ।

Answer: A) 264 Explanation: Given 56% of 225 + 20% of 150 = ? - 109 we know that a% of b = b% of a Now, 225% of 56 + 20% of 150 = ? - 109 200% of 56 + 25% of 56 + 20% of 150 = ? - 109 112 + 14 + 30 = ? - 109 ? = 112 + 14 + 30 + 109 ? = 264

Answer: B) निर्देश पढ़ें स्पष्टीकरण: नियंत्रण इकाई कार्य कर सकती है निर्देशों की व्याख्या करें, निर्देश निष्पादित करें और प्रत्यक्ष संचालन करें। लेकिन निर्देश पढ़ना कंट्रोल यूनिट का कार्य नहीं है।

Answer: D) cooperate on law enforcement. Explanation: When the European union formed nations began to cooperate on law enforcement. The European Union is set up with the aim of ending the frequent and bloody wars between neighbours, which culminated in the Second World War.   As of 1950, the European Coal and Steel Community begins to unite European countries economically and politically in order to secure lasting peace. The six founding countries are Belgium, France, Germany, Italy, Luxembourg and the Netherlands. The 1950s are dominated by a cold war between east and west.   The historical roots of the European Union lie in the Second World War. Europeans are determined to prevent such killing and destruction from ever happening again.

Answer: B) Only power given in the constitution Explanation: A constitutional monarchy is a form of monarchical government established under a constitutional system which acknowledges an elected or hereditary monarch as head of state.   The monarchs in a constitutional monarchy had only the power that was allocated to them in the constitution of their land or republic.

Answer: D) 10 km Explanation: Let distance = x km.Time taken at 3 kmph : dist/speed = x/3 = 20 min late.time taken at 4 kmph : x/4 = 30 min earlierdifference between time taken : 30-(-20) = 50 mins = 50/60 hours.x/3- x/4 = 50/60x/12 = 5/6x = 10 km.